Как решить уравнение 12-3 (x-5) = 6 12+3 (x+7) = 57 9 (x+3) - 12=60

12-3x+15=6

12-3x+15-6=0

-3x=21

x=-7

12 - 3 (х-5) = 6 12 + 3 (х+7) = 57 9 (х+3) - 12 = 60

12 - 3 х+15 = 6 12+3 х+21 = 57 9 х+27-12 = 60

-3 х = - 12-15+6 3 х = 57-12-21 9 х = 60-27+12

х = 21:3 х = 24:3 х = 45:9

х = 7 х = 8 х = 5

12-3 (7-5) = 6 12+3 (8+7) = 57 9 (5+3) - 12 = 60