The perimeter of a rectangle is 40 m . The lengh of the rectangle is 4 m less than 5 times its breath . Find the length of the rectangle .
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2(x+y)=40. x=5y-4
5y-4+y=20
6y=24
y=4
x=5*4-4=16
5y-4+y=20
6y=24
y=4
x=5*4-4=16
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