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x=60/12
x=5.........solución
12x + 8 = 68
12x = 68 - 8
12x = 60
x = 60/12
x = 5
COMPROBAMOS LA SOLUCIÓN
12x + 8 = 68
12 (5) + 8 = 68
60 + 8 = 68
68 = 68
La solución es correcta!