Respuesta:
x = 20
Explicación paso a paso:
x + 4 = 2x - 16
x - 2x = -16 - 4
-x = - 20
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Respuesta:
x = 20
Explicación paso a paso:
x + 4 = 2x - 16
x - 2x = -16 - 4
-x = - 20
x = 20