SOLUTION: a pile of 68 coins consists of quarters and dimes. if the value of the pile is 15.05, how many dimes are there?

Question 698340: a pile of 68 coins consists of quarters and dimes. if the value of the pile is 15.05, how many dimes are there?
Answer by Stitch(470) (Show Source): You can put this solution on YOUR website!
Let A = # of Quarters
Let B = # of Dimes
Equation 1:
Solve equation 1 for one of the variables
Equation 1:
Plug (68 - B) into equation 2 for A
Equation 2:

Simplify

Combine like terms

Subtract 17 from both sides

Divide both sides by -0.15

Now plug 13 into equation 1 for B
Equation 1:
Subtract 13 from both sides

----------------------
There are 13 dimes
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