SOLUTION: Kevin and randy have a jar of 40 coins all of which are ethier quarters or nickels . The value of coins are 5.20 . How many are quarters

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Question 1058720: Kevin and randy have a jar of 40 coins all of which are ethier quarters or nickels . The value of coins are 5.20 . How many are quarters
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39625)   (Show Source):
You can put this solution on YOUR website!
Give variables for each coin to be counted.
Write an equation to account for how many coins and write an equation to account for the amount of money. Solve the resulting linear system of equations. Coin combinations - very typical linear system application

Answer by ikleyn(52847)   (Show Source):
You can put this solution on YOUR website!
.
Kevin and randy have a jar of 40 coins all of which are ethier quarters or nickels . The value of coins are 5.20 . How many are quarters
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There is a special lesson
    - Kevin and Randy Muise have a jar containing coins
in this site. It contains the solved problems that are exactly/precisely your samples.

Read them attentively and then solve your problem by substituting your data.

There is entire bunch of lessons on coin problems
    - Coin problems
    - More Coin problems
    - Solving coin problems without using equations
    - Kevin and Randy Muise have a jar containing coins
    - Typical coin problems from the archive
    - More complicated coin problems
    - Solving coin problems mentally by grouping without using equations
    - Santa Claus helps solving coin problem
    - OVERVIEW of lessons on coin word problems
in this site.

Read them and become an expert in solution of coin problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Coin problems".