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5 August, 14:32

Multi-step equations

1) 30m - 4n + 4n = 2 (m + 4)

2). - 20 (k-3) + 40 K = 20 - 2k

3) - 0.5x + 2.5 = 1.5x - 10

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  1. 5 August, 17:20
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    1) m=2/7

    2) k = - 20/11 or - 1 9/11

    3) x=25/4 (x=6.25)

    Step-by-step explanation:

    1) 30m-4n+4n = 2m+8

    The - 4 n and 4n cancel out.

    30m=2m+8

    28m=8

    m=2/7

    2) - 20k+60+40k = 20-2k

    20k+60=20-2k

    22k+60=20

    22k=-40

    k=-20/11

    3) (I multiplied each side by 10)

    -5x+25=15x-100

    -20x+25=-100

    -20x=-125

    x=25/4
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