Who will help me answer the math questions in the first year of junior high school?

2) Non-positive, positive, and zero.

That is, pour water into the bucket three times with a small bucket, after filling the bucket, the bucket has 1 kg of water left, then pour all the water in the bucket, then pour 1 kg of water in the bucket into the bucket, and finally fill the bucket twice with water and pour it into the bucket, so that the water in the bucket is 9 kg. ）

7) Solution: Set the power outage x hours, according to the problem, 1-x 2) = 2 (1-x) solve the equation x = 2 3

i.e. a power outage of 2 to 3 hours, i.e. 40 minutes.

2.Non-positive 0 and positive.

3.Positive integer (6 , +7, 1).

Negative integer (-28).

Score (, 1 3, , 1 4).

Non-positive numbers (,,0-28).

kg) 7-4 = 3 (kg).

3 3 = 9 (kilograms).

8.Multiplicative distributive property.

2.Non-positive 0 and positive.

3.Positive integers (6 ,+7,1) negative integers (-28) fractions (,1 3,,1 4) non-positive numbers (,,0-28).

Kilogram. 7-4 = 3 kg.

3 3 = 9 (kilograms).

Are you human? You can't do such a simple question, you're amazing, oh my God.

2.Non-positive positive number and zero 3Positive integer [6,1,+7] Negative integer [-28] Fraction [,1 3,,1 4] Non-positive [,,0,-28] 4

12，-20，-33】 【64，128，-256】 【95，191，383】 5.There is one.

It's so easy to be hungry, just think about it.

1) Use 2x-5=0 to get x=5 2

1. Add (or subtract) the same number 5 (or -5) on both sides of the equation at the same time, and the equation remains unchanged;

2, both sides of the equation are multiplied (or divided) by the same non-zero number 2 at the same time, and the equation does not change.

2) x=2 3y from x 2-y 3=0

1. Add (or subtract) the same number -y 3 (or y 3) on both sides of the equation at the same time, and the clear shouting equation remains unchanged;

2. Both sides of the equation are multiplied (or divided) by the same non-zero number 2 at the same time, and the equation does not change.

3) m = -6 obtained from 1 3m-4=m

1. Move items; 1/3m-m=4

2. All of the same kind of items; Answer: -2 3m=4

3. Multiply (or divide) the same non-zero number on both sides of the equation at the same time, and the equation does not change.

4) -x= -3 2 shifts from 2=x-3;

This math problem is very simple, first it is -216 to the third power, and then add 2 to the specific value of x, and the final result is equal to 8.

This question is not written in its entirety. What is outside the parentheses? Doing so means that the negative number is moved to the front of the parentheses and becomes a positive number. Find x. How many are the brackets counted? You didn't write it out. If you think along this line, you will be able to solve the problem quickly.

Hello, the idea of solving this math problem is as follows: because (-2+x) =-216=(-6), so (-2+x)=(-6), x=-4

The power of -6 is 216 so (-2+x) = -6

A: x= -4

-216 to the third power is equal to -6, so x is equal to -4

The original question is (-2+x)(-2+x)(-2+x)=-216, which is equivalent to (x-2)(x-2)(x-2)=-216

There is a set of numbers for this kind of problem, which can decompose 216 factors.

So we get x-2=-6

x=-4

Your question should be an absolute value reduction question:

丨a+b丨+丨a-c丨+丨b丨+丨a丨+丨c丨+丨a+c丨=0+a-c+(-b)+a+(-c)+(a+c).

a-c-b+a-c+a+c

3a-b-c

Set the annual interest rate to be x

3 years so 400 (1 + 3x) =

1+3x=x=A: The annual interest rate is.

Because it is unary and one-time, 3-a=1 =>a=2, and the equation is solved to x=5

Solution: Because it is a one-dimensional equation with respect to x.

So 3-a = 1

a=2 solves 2x-6=4 to get x=5

Ahem, it's a power symbol, right? can be replaced by , e, because it is a one-dimensional equation about x, so 3-a=1, so a=2. , so the solution is x=5

Because it's a one-dimensional equation.

So 3-a = 1

a=22x-6=4x=5

3 If it is at the top right of x, then it is a cubic equation.

For the unary equation of x, the exponent of x is 1,3-a=1, a=2, so the original equation is 2x-6=4, and the solution is x=5

Middle school math questions are simple.

Your question should be.

Geometry Topics Now!