SOLUTION: If johny has twice as many dimes as quarter, amounting to $6.75 in all, how many coins does he have?

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Question 985237: If johny has twice as many dimes as quarter, amounting to $6.75 in all, how many coins does he have?
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!

Let  q  be the number of quarters Johny has.

Then the number of dimes in his possession is  2q.

Thus you have an equation

25q + 10*2q = 675.

Solve it:

(25 + 20)q = 675,

45q = 675,

q = 675%2F45 = 15.

So,  Johny has  15  quarters and  2*15 = 30 dimes.

Check:  15*25 c + 30*10 c = 675 c.