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03-10-2017
Mathematics

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A and B are supplementary angles. If A = 7x - 18 and B = 8x + 3, find x

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choixongdong choixongdong

03-10-2017

supplementary angles, sum = 180
7x - 18 + 8x + 3 = 180
15x - 15 = 180
15x = 195
x = 13

answer
x = 13

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