9. The length of a rectangle is three times its width. It the perimeter is 84 m, find the
length of the rectangle.can you write the process in copy plz
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W=x and l=3x
P=2(l+W)
84=2(3x+x)
84=8x
x=10.5m
So l=3x
l=(3*10.5)
l=31.5m
P=2(l+W)
84=2(3x+x)
84=8x
x=10.5m
So l=3x
l=(3*10.5)
l=31.5m
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