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Anonymous
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Taya Moore ∙
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9x-15 because there are no combined terms.. well or u could plus 15 on both sides and get 9x+ 15
Wiki User
15x9 is 135
135.
That's a peice of cake. All you have to do is multiply 9 by 15. 9 times 15 is 135, so your answer is 135 sqaure feet or 135ft2