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3(x+4)-5(2x+9)=-3(1-x)
3x+12-10x-45=-3+3x
3x-10x+12-45=-3+3x
-7x-33=-3+3x
-7-3x=-3+33
-10x=30
-1(-10x=30)
10x=-30
x=-30/10
x=-3 Respuesta
Espero haberte ayudado ;-)