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08-03-2017
Mathematics

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I don't know how to start this problem, but I've done it in the past.

I dont know how to start this problem but Ive done it in the past class=

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AMackenzieS AMackenzieS

08-03-2017

You want to add the two expressions together and then set it equal to 180º.
9x+28 + 47-2x = 180º.
7x + 75=180º

Simplify from here :)
Let me know if you have more questions! Good luck!

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