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25 November, 15:09

Whats x - (4x-7) = 5x - (x+21)

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  1. 25 November, 15:23
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    X-4x+7=5x-x-21

    x-9x+7=-x-21

    -8x+7=-x-21

    -7x+7=-21

    -7x=-28

    x=4
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