Question

1) 5(х-4) = х + 8 2) 9-7 (х+3) = 5-6х

Answer 1

Ответ:

1)x=7

Пошаговое объяснение:

5x-20=x+8

5x-x=8+20

4x=28

Answer 2

1) 5(x-4)=x+8

5x-20=x+8

5x-x=20+8

4x=28

x=28÷4

x=7

2) 9-7(x+3)=5-6x

9-7x-21=5-6x

-12-7x=5-6x

-7x+6x=5+12

-x=17

x=-17

Answer 3

Let's solve the equations step by step:

1. 5(x - 4) = x + 8

Expand the left side of the equation:

5x - 20 = x + 8

Move all the x terms to one side and the constant terms to the other side:

5x - x = 8 + 20

Combine like terms:

4x = 28

Divide both sides of the equation by 4 to isolate x:

x = 28/4

Simplify:

x = 7

So the solution to the equation is x = 7.

2. 9 - 7(x + 3) = 5 - 6x

Expand the left side of the equation:

9 - 7x - 21 = 5 - 6x

Combine like terms:

-7x - 12 = -6x + 5

Move all the x terms to one side and the constant terms to the other side:

-7x + 6x = 5 + 12

Combine like terms:

-x = 17

Multiply both sides of the equation by -1 to isolate x:

x = -17

So the solution to the equation is x = -17.

Therefore, the solutions to the given equations are x = 7 and x = -17.