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8 March, 13:59

If (x - 1) / x = 20, then x =

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  1. 8 March, 15:17
    0
    X-1/x=20

    Multiply both sides by x.

    x-1=20x

    x-1-20x=20x-20x (Subtract 20x from both sides)

    -19x-1=0

    -19x-1+1=0+1 (Add 1 to both sides)

    -19x=1

    -19x/-19 = 1/-19 (Divide both sides by - 19)

    x=-19
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