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56 - 3x = 38
- 3x = 38 - 56
- 3x = - 18
x = - 18/-3
x = 6
Respuesta.
El valor de x es 6
COMPROBAMOS LA SOLUCIÓN
56 - 3x = 38
56 - 3 (6) = 38
56 - 18 = 38
38 = 38
La solución es correcta!!!