SOLUTION: What makes 14$if you have 200 coins of nikels and dimes

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Question 938178: What makes 14$if you have 200 coins of nikels and dimes
Answer by nerdybill(7384) About Me  (Show Source):
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What makes 14$if you have 200 coins of nikels and dimes
.
Let d = number of dimes
then
200-d = number of nickels
.
.10d + .05(200-d) = 14
.10d + 10-.05d = 14
.05d + 10 = 14
.05d = 4
d = 80 (number of dimes)
.
number of nickels:
200-d = 200-80 = 120