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Write an Equation...Mr.Jones rented the same van for three days. His bill was \$104.49. How many miles did he drive?

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Why?

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3x (multiply symbol) ab = 104.49
x = the fee charged for everyday
a = number of miles
b = fee for every mile

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hmmm...seems like we are missing some information here. Without more information, the only way to write the equation is to make some assumptions. When he rented the van, was he charged a flat rate per day or for the miles driven over the 3 day span?

Let's assume: he is charged x dollars per mile driven. That would make the number of days he rented irrelevant. So, miles driven * (x dollars/mile driven) = \$104.49. Assume x = rate he is charged per mile ( \$/mile).

So equation is : miles driven - \$104.49/x

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I agree.
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now...suppose he is ALSO charged a flat rate per day, then you would have to assume that at the end of those 3 days, the flat rate cost is part of the \$104.49 total charge.

let y = flat rate cost for 3 days

miles driven = (\$104.49 - y)/x
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