HELP WITH ALGEBRA!!!!!!!

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Suppose the lengths of the four side of a quadrilateral are represented by the expressions 3a, a+2, 2a-1, and 3a+6. write the sum of the lenghts (the perimeter), and then simplify.

• HELP WITH ALGEBRA!!!!!!! -

please do not post multiple times, it just slows down. Putting your cries in the subject line slows getting an answer. Most Math teachers answer the ones titled math first.

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