SOLUTION: the outdoors club held a car wash to raise money they washed cars for 5$ each and vans for 7$ each. they washed 45 vehicles and earned 243$. how many o each vehicle did they wash?

Question 940259: the outdoors club held a car wash to raise money they washed cars for 5$ each and vans for 7$ each. they washed 45 vehicles and earned 243$. how many o each vehicle did they wash? FULL SOLUTIONS?!?!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the outdoors club held a car wash to raise money they washed cars for 5$ each and vans for 7$ each. they washed 45 vehicles and earned 243$. how many o each vehicle did they wash?
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Equation:
Quantity:: c + v = 45 vehicles
Value:::: 5c + 7v = 2435 dollars
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Modify for elimination::
5c + 5v = 5*45
5c + 7v = 243
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Subtract and solve for "v":
2v = 18
v = 9 (# of vans washed)
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Solve for "c"::
c + 9 = 45
c = 36 (# of cars washed)
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Cheers,
Stan H.
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