SOLUTION: Tickets for a school play sell for $8 for floor seats and $6 for balcony seats. 72 tickets were sold, bringing in $516. How many of each ticket are sold?

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Question 264073: Tickets for a school play sell for $8 for floor seats and $6 for balcony seats. 72 tickets were sold, bringing in $516. How many of each ticket are sold?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
8F+6B=516
F+B=72 OR F=72-B
8(72-B)+6B=516
576-8B+6B=516
-2B=516-576
-2B=-60
B=-60/-2
B=30 BALCONY SEATS WERE SOLD.
F=72-30
F=42 FLOOR TICKETS WERE SOLD.
PROOF:
8*42+6*30=516
336+180=516
516=516