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Ancho= y
2x + 2y = 70
3x - 2y= 30
Sistema de ecuaciones.
2x + 2y = 70
3x - 2y= 30
--------------------
5x= 100
x= 20
Reemplazamos y hallamos el ancho.
2x + 2y = 70
2(20) + 2y = 70
40 +2y = 70
2y= 30
y= 15
-El largo mide 20 m y el ancho 15 m