SOLUTION: FJoan has only dimes and quarters in her purse. If she has 18 coins worth $3.30, then how many of each coin does she have in her purse?

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Question 1052381: FJoan has only dimes and quarters in her purse. If she has 18 coins worth $3.30, then how many of each coin does she have in her purse?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
D%2BQ=18
and
10D%2B25Q=330
2D%2B5Q=66
From above,
2D%2B2Q=36
Subtracting,
2D%2B5Q-2D-2Q=66-36
3Q=30
Q=10
So then,
D%2B10=18
D=8