SOLUTION: Joe has a collection of nickels and quarters that is worth $7.40. If the number of nickels were doubled and the number of quarters were increased by 8, the value of the coins would

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Question 476025: Joe has a collection of nickels and quarters that is worth $7.40. If the number of nickels were doubled and the number of quarters were increased by 8, the value of the coins would be $10.80. How many quarters does he have?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
5p+25q=740
5p(2)+25(q+8)=1080
10p+25q+200=1080
10p+50q=1480
10p+25q=880
25q=600
q=24
p=28
Joe has 24 quarters..