Posted by **lyne** on Thursday, April 2, 2009 at 5:56pm.

Define variables and write a system of equations for each situation. Solve using substitution.

Suppose you are thinking about buying one of two cars. Car A will cost $17,655. Youn can expect to pay an average of $1230 per year for fuel, maintenance, and repairs. Car B will cost about $15,900. Fuel, maintenance, and repairs for it will average about $1425 per year. After how many years are the total costs for the cars the same?

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**PsyDAG**, Friday, April 3, 2009 at 1:19pm
From your wording,

17,655 + 1230X = 15,900 + 1425X

Solve for X.

I hope this helps. Thanks for asking.

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**Anonymous**, Tuesday, September 16, 2014 at 9:37pm
Bhj677

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**Anonymous**, Monday, January 11, 2016 at 2:41pm
11 years

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