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Find X....PLEASE HELP ME...ASAP SUCK AT MATH!!!

Find X....PLEASE HELP ME...ASAP SUCK AT MATH!!!-example-1

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An exterior angle of a triangle is equal to the sum of the opposite interior
angles

4x - 20 = 2x - 4 + 52
4x - 2x = 20 - 4 + 52
2x = 68
x = 68/2
x = 34
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