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30 May, 08:57

8x+15=3x-20 how do you do this

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  1. 30 May, 12:04
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    Solve for x

    8x + 15 = 3x - 20

    Add 20 to both sides. It should become

    8x + 35 = 3x

    Then minus 8x on both sides, which is now

    35 = - 5x

    Divide both sides by "negative" 5 to get x by itself

    X = - 7

    Check your answer by substitution. (Plug - 7 for x)
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