Respuesta:
x = -10
Explicación paso a paso:
3(x+4)+ x = 2x - 8
3x+12+x =+2x-8
+3x+x-2x = -8-12
+2x = -20
+2x/+2 = -20/+2
Comprobación
3(-10+4)+(-10) = +2(-10)-8
-30+12-10 = -20-8
-28 = -28
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Respuesta:
x = -10
Explicación paso a paso:
3(x+4)+ x = 2x - 8
3x+12+x =+2x-8
+3x+x-2x = -8-12
+2x = -20
+2x/+2 = -20/+2
x = -10
Comprobación
3(x+4)+ x = 2x - 8
3(-10+4)+(-10) = +2(-10)-8
-30+12-10 = -20-8
-28 = -28