How to find x?

-x+7=-4x-20

x = - 9

Step-by-step explanation:

-x+7 = - 4x-20

Move the variable to the left side and change its sign.

-x+4x+7=-20

Move constant to the right side and change its sign.

-x=4x = - 20-7

Collect the like terms.

3x = - 27

Divide both sides of the equation by 3.

x = - 9