Question 1016391: bob has $14.25 in quarters and dimes, there are 75 coins in total. How many quarters/dimes are there. Use an equation. Show your work. Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! Call the amounts of quarters and dimes, q and d. Then we have
q + d = 75 and the value equation is
25q + 10d = 1425 (we work in cents)
Now multiply the top one by ten and subtract...we get...
25q + 10d = 1425
-(10q + 10d = 750)
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15q = 675
q = 45 quarters so that you also have
d = 30 dimes
