Math Problems About Age Math Problems About Age

If Xiaohong's current age is x years old and her uncle is y years old, then her uncle is (y-x) years older than Xiaohong. Uncle said that when I was your age, you were only three years old, that is, (y-x) years ago, Xiaohong was only three years old, so there was.

x-（y-x）=3

When the little red elephant uncle was so old, the uncle was already 42 years old, that is, (y-x) years later, the uncle was already 42 years old, so there was.

y+（y-x）=42

Solution: x=16

y=29 means that Xiaohong is now 16 years old and her uncle is 29 years old.

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Solution: If Xiaohong is x years old and his uncle is y years old, then their age difference is (y-x) years.

3+（y-x）=x

y+ (y-x) =42

2y-x=42---2

Bring 1 into 2, 2(2x-3)-x=42

x=16y=29A:

Uncle is X years older than Xiaohong.

Uncle's age: 3+x

Little Red's age: 42—x

x=(3+x)-(42-x)

x = 13 Uncle's age: 16

Little Red's age: 29

Set up Little Red X, Uncle Y

x-(y-x)=3

y+(y-x)=42

Solve it yourself.

Solution: A family of four, the total age of this year is 73, it stands to reason that four years ago, everyone had to subtract four years old, that is, subtract 16

So 73-16=57, but why is there one more than 58?

The reason is that there is a person who is not old enough to lose four years and is one year short, which means that the son was not born four years ago.

The birth of a son three years ago means that the son is three years old this year, then the daughter is 5 this year, and the sum of the ages of the husband and wife is 73-3-5 = 65

and because the husband is three years older than his wife.

So the age of the wife is: (65-3) 2=31 and the age of the husband is 31+3=34

73-58=15

4*4-15=1 The son was born three years ago and was only 3 years old, the daughter was 3 + 2 = 5 years old, the wife (73-3-5-3) 2 = 31 years old, and the husband 31 + 3 = 34 years old.

A: The son is 3 years old, the daughter is 5 years old, the wife is 31 years old, and the husband is 34 years old.

Solution: Let the son be a year old and the wife b years old.

then a+a+2+b+b+3=73

a+2+b+b+3-12=58

a=3, b=31

So the son is 3 years old, the daughter is 5 years old, the wife is 31 years old, and the husband is 34 years old.

Husband: 34

Wife: 31 Daughter: 5

Son: 3