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OpenStudy (itsbribro):
A collection of quarters and dimes is worth $12.40. There are 67 coins in all. How many of each coin are there? ____ quarters ____ dimes
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OpenStudy (anonymous):
12.40=d*0.1+0.25*q
OpenStudy (anonymous):
d+q=67
OpenStudy (anonymous):
where d is number of dimes and q is number of quarters
OpenStudy (anonymous):
a way to think of this is how many dimes and quarters make 12.40
OpenStudy (anonymous):
now you just solve for d number of dimes and q number of quarters
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