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-15+12+6x-18=3x-21x+1+2
6x-3x+21x=1+2+5-12+18
24x=24
x= 24/24 <- simplificando queda:
x=1
- 15 + 12 + 3.(2x - 6) = 3x - ( 21x - 1) + 2 = Quitamos parentesis
-15 + 12 + 6x - 18 = 3x - 21x + 1 + 2 = Realizamos operaciones
-33 + 12 + 6x = -18x + 3
- 21 + 6x = -18x + 3
6x + 18x = 3 + 21
24x = 24
x = 24/24
x = 1
El valor de x es 1