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30 March, 16:04

What is the value of - 4k+2 (5k-6) = - 3k - 39

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  1. 30 March, 16:14
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    -4k+2 (5k-6) = - 3k-39

    -4k+10k-12=-3k-39

    6k-12=-3k-39

    +3k both sides

    9k-12=-39

    +12 both sides

    9k=-27

    :9 both sides

    k=-3

    check

    -4 (-3) + 2 (5 (-3) - 6) = - 3 (-3) - 39

    12+2 (-15+-6) = 9-39

    12+2 (-21) = 9-39

    12-42=-30

    -30=-30

    k=-3 holds true
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