SOLUTION: there are some two dollars coins and some five dollars coins. there are totally forty coins, which give a total amount of one hundred and twenty five dollars. how many two dollars

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Question 675319: there are some two dollars coins and some five dollars coins. there are totally forty coins, which give a total amount of one hundred and twenty five dollars. how many two dollars coins are there? how many five dollars coins are there?
Answer by sachi(548) About Me  (Show Source):
You can put this solution on YOUR website!
let there are x $2 coins
so the no of $5 coins=40-x (as total coins are 40)
so the value
2*x+5*(40-x)=125
or 2x+200-5x=125
or 3x=200-125=75
or x=25
so there are 25 $2 coins & 15 &5 coins
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