SOLUTION: Joe PAYS 372 for 24 gallons of paint. If the indoor paint costs $12 per gallon, and the outdoor paint costs $18per gallon, how many gallons of each did he buy?

Question 796147: Joe PAYS 372 for 24 gallons of paint. If the indoor paint costs $12 per gallon, and the outdoor paint costs $18per gallon, how many gallons of each did he buy?
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
x for gallons of indoor paint
y for gallons of outdoor paint

Account for cost:

Account for gallons of paint:

Simplify the cost equation.

Most comfortable is maybe use elimination. Multiply the gallons equation by 2 and subtract from the simplified cost equation.

.

NOW can you find the value for x on your own?-----(BIG Hint is use the original gallons account equation)
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