Respuesta:
x = 13
Explicación paso a paso:
12 + x - 5 = 25 - 5
12 + x - 5 = 20
x = 20 - 12 + 5
Comprobación
12 + 13 - 5 = 25 - 5
25 - 5 = 25 - 5
20 = 20
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Respuesta:
x = 13
Explicación paso a paso:
12 + x - 5 = 25 - 5
12 + x - 5 = 20
x = 20 - 12 + 5
x = 13
Comprobación
12 + 13 - 5 = 25 - 5
25 - 5 = 25 - 5
20 = 20