SOLUTION: Alan has 14 coins.they are 5c,10c and 20c.the total value of the coins is $1.75.he has twice as many 10c coins as 5c.how many 20 c coins are there?please help me Thanks

Question 1012665: Alan has 14 coins.they are 5c,10c and 20c.the total value of the coins is $1.75.he has twice as many 10c coins as 5c.how many 20 c coins are there?please help me
Thanks
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
Set-up the system, and the rest is to solve the system.

x, y, z, how many of each coint 5c, 10c, 20c.

Simplify the money count equation.

and substitute for y in this and the coin count equation.

----can you do the rest?
RELATED QUESTIONS
Lucas has 18 coins 5c, 10c,20c in his pocket. There are three times as many 10c coins as... (answered by Fombitz)

Jacques has a number of 10c 20c and 5c coins in his bag. He has one more 20c coin than... (answered by Edwin McCravy)

There are two of each of the following coins:5c,10c,20c 50c. How many different totals... (answered by KMST,richwmiller)

A bank teller notices that he has 50 coins all of which are 5c and 10c pieces. He finds... (answered by Cromlix,malglu)

There were 5c 10c and 20c coins in Joel's wallet in the ratio of 2:6:7 respectively. If... (answered by josgarithmetic,Edwin McCravy,ikleyn)

A bank teller notices that he has 50 coins all of which are 5c and 10c pieces. He finds... (answered by Cromlix)

Hi John has 36 coins comprising 20c 50c and $1 coins. He has twice as many $1 coins as... (answered by Theo,josgarithmetic,ikleyn,greenestamps,MathTherapy)

A set of 10 coins may contain any combination of 1c, 5c, 10c, 20c, or 50c coins. In how... (answered by Edwin McCravy)

I have 30 coins consisting of 5c coins and 20c coins. If the total value of the coins is... (answered by kmanu,MathTherapy)