SOLUTION: Bob buys Halloween candy. Some pieces cost 2� each and some cost 5� each. There are 7 more of the 2� pieces. The total cost was $1.54. How many 5� pieces were purchased?

Question 999681: Bob buys Halloween candy. Some pieces cost 2� each and some cost 5� each. There are 7
more of the 2� pieces. The total cost was $1.54. How many 5� pieces were purchased?
Answer by josgarithmetic(39630) (Show Source): You can put this solution on YOUR website!
Same as a mixture problem.

x, how much 2cent pieces
y, how much 5cent pieces

This is apparently a simple linear system application for counts of items and the cost of a combination of those items. Note very carefully that the cost account equation is in units of CENTS, not dollars.

You can make the substitution in the system.

-------the count of the 5 cent pieces.
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