Respuesta :

Answer:

x = - 4

Step-by-step explanation:

-4x - 7 - 3x + 4 = 25

- 7x = 25 + 7 - 4

- 7x = 28

7x = - 28

x = - 28 : 7

x = - 4

You need to isolate the variable "x" in the equation:

-4x - 7 - 3x + 4 = 25   Combine like terms (-4x - 3x and -7 + 4)

-7x - 3 = 25   Add 3 on both sides

-7x - 3 + 3 = 25 + 3

-7x = 28           Divide -7 on both sides to get "x" by itself

[tex]\frac{-7x}{-7} =\frac{28}{-7}[/tex]

x = -4