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3 February, 16:25

What is 10k+-1=4k+-43 and how?

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  1. 3 February, 18:44
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    10k + (-1) = 4k + (-43)

    10k-1=4k-43

    Subtract 45 from both sides and add 1 to both sides:

    6k=-42

    Divide by 6 on both sides

    k = - 7
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