Question

1)x+9=0 2)x+5=12 3)3x+7=4 4)3x-1=8 5)7+4x=5x Распишите пожалуйста все

Answer 1

1) х+9=0;
х=-9;

2) х+5=12;
х=12-5;
х=7;

3) 3х+7=4;
3х=4-7;
3х=-3;
х=-1;

4) 3х-1=8;
3х=8+1;
3х=9;
х=3;

5) 7+4х=5х;
7=5х-4х;
7=х;
х=7.

Answer 2

1. х=9-0 х=9

2. х=12-5  х=7

3. 3х=7-4    3х=3    х=3:3    х=1

4. 3х=8+1    3х=9    х=9:3  х=3

5. -5х+4х=-7

-х=-7

х=7

Answer 3

Sure, I'll solve each equation step by step:

1. x + 9 = 0

To solve for x, we need to isolate it on one side of the equation.

Subtract 9 from both sides: x = -9

2. x + 5 = 12

To solve for x, we need to isolate it on one side of the equation.

Subtract 5 from both sides: x = 12 - 5 x = 7

3. 3x + 7 = 4

To solve for x, we need to isolate it on one side of the equation.

Subtract 7 from both sides: 3x = 4 - 7 3x = -3

Divide both sides by 3: x = -3 / 3 x = -1

4. 3x - 1 = 8

To solve for x, we need to isolate it on one side of the equation.

Add 1 to both sides: 3x = 8 + 1 3x = 9

Divide both sides by 3: x = 9 / 3 x = 3

5. 7 + 4x = 5x

To solve for x, we need to isolate it on one side of the equation.

Subtract 4x from both sides: 7 = 5x - 4x 7 = x

So, the solutions for each equation are:

1. x = -9
2. x = 7
3. x = -1
4. x = 3
5. x = 7