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85m-28m= 57
17m+40m= 57
85/5= 17
x=5y
x-28=y+40
sustituimos x=5y en la segunda ecuacion:
x-28=y+40
5y-28=y+40
5y-y=40+28
4y=68
y=68/4
y=17
si y=17
x=5y
x=5(17)
x=85
el mayor mide 85 m y el menor 17 m