Philip P. answered • 10/19/14

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The length of a rectangle is twice as great as it's width:

L = 2W

When both width and length are increased by 5 inches, the new rectangle has a perimeter of 80 inches

2(L+5)+ 2(W+5) = 80

Substitute 2W for L:

2(2W+5) + 2(W+5) = 80

4W + 10 + 2W + 10 = 80

6W + 20 = 80

6W = 60

**W = 10 inches**

**L =**2W = 2*10 =

**20 inches**