Asked by Pam
Jeff has 12 coins that have a total value of $2.25.If there are only quarters and dimes, how many of each kinds are there?
Answers
Answered by
PsyDAG
Q = 2.5D
10D + 25Q = 225
Substitute 2.5D for Q in second equation and solve for D. Insert that value into the first equation and solve for Q. Check by inserting both values into the second equation.
10D + 25Q = 225
Substitute 2.5D for Q in second equation and solve for D. Insert that value into the first equation and solve for Q. Check by inserting both values into the second equation.
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