SOLUTION: a child is collecting state quarters and new $1 coins. if she has a total of 28 coins, and the number of quarters is 10 more than the number of dollar coins, how many of each type

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Question 1125141: a child is collecting state quarters and new $1 coins. if she has a total of 28 coins, and the number of quarters is 10 more than the number of dollar coins, how many of each type of coin does she have?
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
d dollars and d+10 quarters

d%2B%28d%2B10%29=28
2d%2B10=28
2d=18
d=9


19 quarters
and
9 of 1-dollars