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Me había equivocado :v
4x - 12/2 + 12 = 24
4x - 6 + 12 = 24
4x + 6 = 24
4x = 24 - 6
4x = 18
x = 18/4
x = 9/2
Respuesta.
x = 9/2
VERIFICAMOS LA SOLUCIÓN
4x - 12/2 + 12 = 24
4 (9/2) - 12/2 + 12 = 24
36/2 - 6 + 12 = 24
18 - 6 + 12 = 24
18 + 12 - 6 = 24
30 - 6 = 24
24 = 24
La solución es correcta!!!