(2x – 11) + 15 = 3x + 12

(2x - 11) + 15  = 3x + 12

Removing parentheses:

2x - 11 + 15  =  3x + 12

Simplifying:

2x + 4  =  3x + 12

Subtacting 2x from both sides:

4  =  x + 12

Subtracting 12 from both sides:

-8  =  x