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26 December, 15:21

The equation 9+12m=6+15 (m-1) models the following situation: Movie-rental company A charges a sign-up fee of $9 plus $12 per month, and company B charges $6 for the first month plus $15 per month after that. At a certain number of months, the cost of the two companies is equal. Which equation is a simplified version of the one above?

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  1. 26 December, 18:33
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    9 + 12m = 6 + 15

    12m=21-9

    12m=12

    m=12

    ---

    12

    m=1

    espero ter ajudado bjjs
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