SOLUTION: I always save my change week to week. This week I found all nickels and dimes. There were twice as many dimes as nickles and the value of the dimes was $.90 more than the value of

Question 191932: I always save my change week to week. This week I found all nickels and dimes. There were twice as many dimes as nickles and the value of the dimes was $.90 more than the value of the nickles. How many nickles and dimes do I have?
I THINK I KNOW THE ANSWERS BUT I AM HAVING TROUBLE COMING UP WITH THE CORRECT WAY TO WRITE IT. PLEASE HELP!!
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
There were twice as many dimes as nickles and the value of the dimes was $.90 more than the value of the nickles.
.
Let n = number of nickels
then
2n = number of dimes
.
.10(2n) = .05n + .90
.20n = .05n + .90
.15n = .90
n = .90/.15
n = 6 (nickels)
.
Dimes:
2n = 2(6) = 12 (dimes)

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