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-10 + x = -15
x = -15 +10
x = -5
x = - 15 + 10
x = - 5
Respuesta.
El valor de x es - 5
COMPROBAMOS.
-10 + x = - 15
- 10 + (- 5) = - 15
-10 - 5 = - 15
- 15 = - 15
La solución es correcta.