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(x + 28)/7 = 12
x + 28 = 12*7
x + 28 = 84
x = 84 - 28
x = 56 → respuesta
COMPROBACIÓN:
(x + 28)/7 = 12
(56 + 28)/7 = 12
84/7 = 12
12 = 12 → Se cumple la igualdad
¡El resultado es correcto!