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PLEASE HELP MEEE!

The perimeter of a triangle is 7a - 11b. If two of its sides are 2a + b and a - 9b, what is the third side?

1 Answer

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Hope this helps.
The answer is 4a-3b
PLEASE HELP MEEE! The perimeter of a triangle is 7a - 11b. If two of its sides are-example-1
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