SOLUTION: While on a four-week hiking trip in the mountains, the Tryon family washed 11 loads of clothes at The Mountain View Laundry. The 20-lb capacity washing machine costs $1.50 per load

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Question 311813: While on a four-week hiking trip in the mountains, the Tryon family washed 11 loads of clothes at The Mountain View Laundry. The 20-lb capacity washing machine costs $1.50 per load while the 30-lb costs $2.50. Their total laundry expense was $20.50. How many loads were laundered in each size washing machine?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x+y=11 y=11-x
1.5x+2.5y=20.5
1.5x+2.5(11-x)=20.5
1.5x+27.5-2.5x=20.5
-x=-7
x=7
y=13