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18 October, 09:54

I need to solve for 3x+7=-x-1

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  1. 18 October, 10:23
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    3x+7=-x-1

    move - x to the other side

    sign changes from - x to + x

    3x+x+7=-x+x-1

    3x+x+7=-1

    4x+7=-1

    move 7 to the other side

    sign changes from + 7 to - 7

    4x+7-7=-1-7

    4x=-8

    Divide by 4 for both sides

    4x/4=-8/4

    Answer: x=-2
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