Mathematics, 20.01.2021 05:50, zaygonegraduate

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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The equation 9+12m=6+15(m-1) models the following situation: Movie-rental company A charges a sign-...