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zmey [24]
3 years ago
10

A phone company charges $25 per month, plus an installation fee of $50. If you have paid the phone company $375, how many months

have you had the phone?
Mathematics
1 answer:
Mamont248 [21]3 years ago
3 0
The total bill was inclusive of the one-time payment of $50 and an additional payment of $25 per month. The only unknown variable here is the amount of months you've had the phone. This can be solved by isolating the unknown variable, like so:

Let: x = number of months

Total bill = one-time payment + monthly payment * number of months
$375 = $50 + $25x
375 - 50 = 25x
325 = 25x

325/25 = 25x/25
x = 13

Therefore, you've had the phone for 13 months.
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