SOLUTION: Paul earns $4 an hour working at the library and $8 an hour mowing lawns. this week he worked 25 hours and earned $164. how many hours did he work at the library?
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Question 828688: Paul earns $4 an hour working at the library and $8 an hour mowing lawns. this week he worked 25 hours and earned $164. how many hours did he work at the library? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! ---
x = hours at library
y = hours on lawns
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x + y = 25
4x + 8y = 164
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copy and paste the above linear system in standard form into this matrix-method solver:
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solution:
x = hours at library = 9
y = hours on lawns = 16
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