SOLUTION: Solve the problem. Joe has a collection of nickels and dimes that is worth $6.00. If the number of dimes were doubled and the number of nickels were increased by 6, the value of th

Algebra ->  Linear-equations -> SOLUTION: Solve the problem. Joe has a collection of nickels and dimes that is worth $6.00. If the number of dimes were doubled and the number of nickels were increased by 6, the value of th      Log On


   

Question 251401: Solve the problem. Joe has a collection of nickels and dimes that is worth $6.00. If the number of dimes were doubled and the number of nickels were increased by 6, the value of the coins would be $9.90. How many dimes does he have?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
5n+10d=600
10*2*d+5*(n+6)=990