Respuesta:
X+10 = 40
X+10-40 = 40-40
X - 30 = 0
-30 = -X
-30/-1 = -X/-1
30 = X
X = 30
Comprobación :
(30)+10 = 40
40 = 40
Explicación paso a paso:
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Respuesta:
X+10 = 40
X+10-40 = 40-40
X - 30 = 0
-30 = -X
-30/-1 = -X/-1
30 = X
X = 30
Comprobación :
(30)+10 = 40
40 = 40
Explicación paso a paso: