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X = 2Y (2)
Reemplazas (2) en (1)
X + Y = 141
2Y + Y = 141
3Y = 141
Y = 141/3
Y = 47
Reemplazas Y en (2)
X = 2Y
X = 47×2
X = 94
¿cuanto mide cada uno?
E. 47cm y 94cm