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i dont nderstand i need to write a system of equations for it

Mathematics
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a family member has some five dollar bills and one dollar bills in her wallet . altogether she has 18 bills and a total of $62. how many of each bill does she have?

Mar 27th, 2015

5x+y=62  (1)

x+y = 18  (2)

(1)-(2), 

4x = 44 

x = 11, 

y = 18-x =7 




Mar 26th, 2015

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Mar 27th, 2015
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Mar 27th, 2015
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