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x = 25 - 5 - 10
x = 10
Respuesta :
x = 10
Comprobamos :
x + 10 + 5 = 25
10 + 10 + 5 = 25
25 = 25
La solución es correcta.
x +15 = 25 → +15 pasa a restar
x = 25 -15
x = 10