Posted by jonathan on Saturday, December 15, 2007 at 8:36pm.
Is the total value $6.80?
If so, then let Q be the number of quarters and D be the number of dimes.
You know that
Q -D = 9, and
0.25Q + 0.1D = 6.80
Solving bu substitution,
0.25Q + 0.1(Q-9) = 6.80
0.35Q = 7.70
Q = 22
Now solve for D
omg ty u are a super pro
ty, yw :)
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