# algebra

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Cindy has 34 meters of fencing. She plans to build a rectangular dog run that is 2 meters wide. How long can the dog run be?

• algebra -

L = Length

W = Width

The perimeter of a rectangle

P = 2 L + 2 W

In this case W = 2 m

P = 34 m

34 = 2 L + 2 * 2

34 = 2 L + 4 Subtract 4 for both sides

34 - 4 = 2 L + 4 - 4

30 = 2 L Divide both sides by 2

15 = L

L = 15 m

• algebra -

13

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