If the elder brother is thirteen years older than the younger sister, the elder brother treats the y

Right. Because the elder brother and sister are thirteen years old, it is equivalent to the eldest brother like a father.

My brother is 13 years older than my sister, and my brother is like half a master to my sister's child, this can't be compared, 13 years older, that's not too big, and my brother is my brother, and her children are still normal, it doesn't matter how big it is, there's nothing to correct.

This is because the elder brother must be able to take good care of his sister from all aspects and care for his sister, so it plays a good role in protection.

No matter how old the elder brother is older than the younger sister, the older brother is the uncle to the younger sister's children.

This is also very normal, the eldest brother is the father, and the age of the difference is old.

No matter how old the elder brother is, he is also the elder brother, the child's uncle.

Although you are older, you still call your uncle, but you know how to love your nephew better than your uncle who has a younger annual fee.

If my brother is 13 years older than my sister, my brother treats my sister's children like half an old man, I don't think that's right, it's just that my uncle is older.

If the elder brother is 13 years older than the younger sister, the elder brother treats the younger sister's child like half a grandfather, so it's not appropriate to say this, after all, it's an uncle, how can he compare with grandpa.

My brother is 13 years older than my sister, and my brother treats my sister's children like half an old man, which is different.

Method 1: Use equations to solve.

Set: Sister Bobi brother and sister are this year old, and the elder brother is 36-x years old this year, so the age difference between the elder brother and the younger sister this year is: (36-x)- When the elder brother is as old as the younger sister, the age difference between the elder brother and the younger sister is:

x-3。According to the constant age difference between siblings, the column equation is:

36-x）-x=x-3

Solution: 36-x-x=x-3

Move item: x+x+x=36+3

Merge Likes:

3x = 39 with a coefficient of 3 divided by x on both sides at the same time, x = 13 (years).

Method 2: Do it with arithmetic.

Draw the picture first, as shown in the figure below.

The upper two lines in the figure represent the age of the older brother and sister this year, and their sum is equal to 36 years old, while the older brother is older than the younger sister (age difference n) is unchanged. In this way, when the elder brother is as old as the younger sister (the second line is wise), and the younger sister is only 3 years old (the third line), then the difference between the second line and the third line is the same.

The difference between the first and second line segments (age difference n) is the same. If you move the part of the first line segment above that is more than the second line segment (age difference n) along the black arrow to the right end of the third line segment (3 years old), then the three line segments are the same length, that is, 36 + 3 = 39 is 3 times the age of the younger sister this year (the second line segment).

36 + 3 = 39 years old, this 39 is just 3 times the age of my sister this year.

So my sister's age this year is:

13 (years old).

Let's say my sister is x years old this year, and my brother is 36-x. When the elder brother is as old as the younger sister, it is 36-x-x years ago, and the reference can get 3 + (36-2x) = x, and the solution is x=39 3=13, so the only thing is that the younger sister is 13 years old this year.

My sister is x years old this year.

The elder brother is 36-x years old.

36-x-x=x-3

x = 13 years old.

11 years old.

My sister is six years old this year, and my brother is 11 years old this year, that is, my brother is 5 years older than my sister, so when my brother is 16 years old, my sister is 11 years old.

The elder brother is called a man born to the same parents or one of the parents who is older than him, and it is also an honorific title for a man of the same generation. Sister originally means having a common father or mother, a girl younger than oneself, and can also refer to any girl younger than oneself.

This year, my brother is 12 years old and 5 years older than my sister, and according to the question, we can get my sister's age: 12-5=7 years old; Need to calculate two years later, the age of the elder brother We only need to add the year on the basis of the elder brother's age to get the elder brother's age, the elder brother's age after two years is: 12 + 2 = 14, and the younger sister's age after two years:

7 + 2 = 9, the age difference between the elder brother and the younger sister: the age of the elder brother - the age of the younger sister = 14-9 = 5, so the elder brother is 5 years older than the younger sister after two years.

This year, my brother is 12 years old, 5 years older than my sister, and two years later, my brother is 5 years older than my sister, and the age of my brother and sister will not change because of the passage of time, and the age difference between the two will not increase, for example, if my brother is a 15-year-old sister, I am ten years old this year, and the difference is five years, and two years later, my brother is a 17-year-old sister, and the age difference between my brother and sister at 12 years old is still five.

Hello! Here's what you can answer.

1.It is known that the elder brother is 12 years old and the younger sister is 5 years old.

2.Calculation: The number of years older than the younger sister = 12-5 = 7 years.

Of course, my sister is 7 years younger than my brother. Two years later, my brother and sister were 7 years older.

My brother is 12 years old this year, 5 years older than my sister, and two years later my brother is 5 years older than my sister. The elder brother is 12 years old, 5 years older than his sister, and his younger sister is 7 years old, and two years later, his brother is 14 years old, and his younger sister is 9 years old, and his brother is still 5 years older than his sister.

My sister is 7 years old. Two years later, my brother was 14 years old and my sister was 9 years old, and the difference between the two was 5 years. So, this year, my brother is 12 years old, 5 years older than my sister, and two years later, my brother will also be 5 years older than my sister.

Two years later, my brother was 7 years older than my sister.

My brother is 12 years old this year, 5 years older than my sister, and in two years my brother is a few years older than my sister:

For example, if the elder brother is a 15-year-old sister, he is ten years old this year, and the difference is five years, and two years later, the elder brother is a 17-year-old sister, is the age difference between the 12-year-old brother and the younger sister, or five...

Two years later, my brother is still 5 years older than my sister because my brother is 2 years older. My sister is also 2 years older.

The elder brother is 11 years old, the younger sister is 3 years old, and when the younger sister is 6 years old, the older brother is 8 years older than the younger sister.

First of all, we have to review the topic, there is a smoke bomb here, "when my sister is 6 years old", how old is my sister, and how old is my brother, so no matter how old my sister is, how old my brother is older than my sister will not change.

Then we just need to put the age of the elder brother - the age of the younger sister = 11 years old - 3 years old = 8 years old.

So my brother is 8 years older than my sister.

The elder brother is 11 years old this year, and the younger sister is 3 years old this year, when Pai Yuan and his sister are 6 years old, the elder brother is 14 years old, and the elder brother is 8 years older than the younger sister, so no matter how young he is, the age difference between the blind brother and the younger sister is the same.

The elder brother Zhengchang is (8) years older than the younger sister Qiqing;

8 (years old).

Summary. Dear, hello, I'm glad to answer for you, my brother is 15 years old, my sister is 7 years old, my brother's age is 3 times that of my sister: my brother is 21 years old, my sister is 7 years old, and my brother's age is 3 times that of my sister.

My brother is 15 years old this year, my sister is 7 years old, how old is my sister, my brother is 3 times older than my sister?

Dear, hello, I'm glad to answer for you, my brother is 15 years old this year, my sister is 7 years old, and my brother's age is 3 times that of my sister Beishou: my brother is 21 years old, my sister is 7 years old, and my brother's age is 3 times that of my sister.

Classmates, did you make a mistake in the question<>

A few years ago, my brother was three times older than my sister.

Classmates, the question is incomplete<>

My brother is 15 years old this year, my sister is 7 years old, how old is my sister, my brother is 3 times older than my sister?

If the younger sister's age is x, the brother's age is 3x. Because the elder brother is 8 years older than the younger sister, so Shipei has searched for this: 3x = x + 82x = 8x = 4, so when the younger sister is 4 years old, the elder brother's age is 12 years old.

When my sister was four years old, my brother was three times as old as my sister.

Hello! The elder brother is seven years older than the younger brother, the younger brother is five years older than the younger sister, and the older brother is how old is the younger sister? How to explain this question?

Solution: According to the known conditions, we know that the age of the elder brother and the younger sister are related to the younger brother, so we can set the age of the younger brother as a, the age of the elder brother is: a+7, and the age of the younger sister is:

A-5, ask your brother to be a few years older than your sister, and substitute the equation into the calculation to get the result. Namely:

Solution: Set the younger brother's age to A, respectfully.

a+7）-（a-5）

a+7-a+5

a-a+7+5

12 (years old) Answer: My brother is 12 years older than my sister.

The elder brother is 7 years older than the younger brother, and the younger brother is 5 years older than the younger sister, so the older brother is older than the younger sister is 7 plus 5 equals 12 years old.

The elder brother is 12 years older than the younger sister, and the older brother is younger than the younger sister, and the calculation process is 7+5=12 so the answer is 12 years older.

For every year that my sister grows, so does my brother. Therefore, when my sister was 10 years old, it was 3 years later, and my brother's age was 12 + 3 = 15 years old.

Because the younger sister is growing up at the same time, the elder brother is also growing up, and the age of the two people is growing up simultaneously, that is, the age difference between the two people is unchanged, so the age difference between the two people can be calculated with this year, and with 12-7=5, the elder brother is five years older than the younger sister.

Because the age of both people increases at the same time.

So too many teenagers are the same age.

If the precession does not change, it will be subtracted directly:

12-7=5 (years).

or 12+(10-7) -10=5 years.