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Mathematics 9 Online
OpenStudy (anonymous):

A jar contains 40 coins consisting of dimes and quarters and having a total value of $4.90. How many of each kind of coin are there?

OpenStudy (anonymous):

if you let x = the # of dimes, and y = the # of quarters, you have \[x + y =40~~~(1)\]the total number of coins then\[0.1x+0.25y=4.90~~~(2)\]the total cost... just work on both equations to solve for x and y

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