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18 September, 01:23

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

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  1. 18 September, 01:30
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    7x-18=8x+3

    +18; + 18

    21

    7x = 8x+21

    -7x - 7x

    x = 21
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