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26 July, 10:15

Solve 7x - 4 = 5x + 15 for x.

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  1. 26 July, 10:29
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    7x-4=5x+15

    -5x on both sides

    2x-4=15

    add four to both sides

    2x=19

    divide both sides by 2 to isolate x

    x=9.5
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