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30 July, 13:28

What is x? - 15+3x-7x=-43

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  1. 30 July, 13:33
    0
    -15=3x-7x=-43

    -15-4x=-43

    -4x=43+15

    -4x=-28

    x=7
  2. 30 July, 13:57
    0
    -15+3x-7x=-43

    add like terms

    3x-7x=-4x

    -15-4x=-43

    add 15 to both sides

    -4x=-28

    divide both sides by 4

    -x=-7

    mulitply - 1

    x=7
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