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11 April, 20:28

Simplyfy (-9a - 20c) - (-15a + 3c) - (-22a - 7c) ?

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  1. 11 April, 20:39
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    (-9a - 20c) - (-15a + 3c) - (-22a - 7c)

    = - 9a - 20c + 15a - 3c + 22a + 7c

    = (-9a + 15a + 22a) + (-20c - 3c + 7c)

    = 28a - 16c
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