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a rectangle has a side length 2x+9 and side width x. If the perimeter is 36 cm, what is the value of x?
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a rectangle has a side length 2x+9 and side width x. If the perimeter is 36 cm, what is the value of x?

User Bastien Jansen
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1 Answer

4 votes
2(2x + 9) + 2(x) = 36

4x + 18 + 2x = 36

Combine like terms.

6x + 18 = 36

Subtract 18 from both sides.

6x = 18

Divide 6 on both sides.

x = 3

Hope this helps!
User Tomek Cejner
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7.2k points
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