SOLUTION: Richard has twice as many dimes as quarters, amounting to $6.75 in all. How many coins does he have?

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Question 666557: Richard has twice as many dimes as quarters, amounting to $6.75 in all. How many coins does he have?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
quarters =x
dimes = 2x
value = 675 cents
25x+10*2x=675
45x=675
x= 675/45
x= 15
quarters = 15
dimes = 30