Question

7-2(x)-2(-10)=15
Write the equation.

Answer 1

Answer: x = - 21

Explanation:

7-2(x)-2(-10)=15

7-2x - (2*10) =

7 - 2x - 20 =

7 - 20 -2x =

-27 - 2x = 15 ;

↔ -2x + (-27) =

-2x - 27 = 15 ;

-1 ( -2x -27) = 15 *(-1)
2x + 27 = -15 ;

2x + 27 - 27 = -15 -27 ;

2x = -42 ;

2x / 2 = - 42/2 ;

x = -21 .