(8x+3)-(12x+6)=9 Решите плз

Question

(8x+3)-(12x+6)=9
Решите плз

Answer 1

8х + 3 - 12х - 6 = 9
-4 х + 3 - 6 = 9
-4х + (-3) = 9
-4х = 9 + 3
-4х = 12
х = 12 / (-4)
х = -3

Answer 2

8х+3-12х-6=9
-4х-3=9
-4х=9+3
-4х=12
х=12:-4
х=-3