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

I don't know how to start this problem, but I've done it in the past.-example-1
User Naveen Shan
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1 Answer

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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!
User Party Ark
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