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3x - 4x = 20-16
-1x = 4
X = 4/-1
Comprobación
Reemplazados (x) por -4
16+3(-4) = 4(-4)+20
16 -12 = -16 + 20
4 = 4
Éxitos cualquier duda pregunta.
16-20 = 4x-3x
-4 = x
Comprobación
16+3(-4) = 4(-4)+20
16 -12 = -16 + 20
4 = 4