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8 September, 18:25

Solve for z. 8z - 4 = 7z

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  1. 8 September, 18:50
    0
    8z - 4 = 7z

    move 8z to the other side

    sign changes from + 8z to - 8z

    8z-8z-4=7z-8z

    -4 = 7z-8z

    -4 = - z

    mutiply both sides by - 1 to get + z

    (-4) (-1) = (-z) (-1)

    Answer:

    z = 4
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