# algebra 1

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The length of a rectangle is twice the width. The perimeter is 42cm. find the length of each side.

• algebra 1 -

l=2W
P=2L+2W=2(2W)+2W

solve for W, and then solve for L

• algebra 1 -

2(2x)+2x=42
6x=42
x=7
width=7
length=14

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