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8-12x=2x-27
35=14x
2.5=x
(4*2)-(4*3x) = -2x-27
8-12x = -2x-27
8-8-12x = -2x-27-8
12x = -2x-35
12x+2x = -2x+2x-35
14x = -35
=
x = -2,5
COMPROBACIÓN
4*(2-3*(-2,5)) = -22
-2*(-2,5)-27 = -22