Tickets to a concert cost $2 for children and $5 for adults. If 630 people attended the concert and the ticket sales totaled $2,
910, how many children attended the concert?
1 answer:
C+a=630
a=630-c
2c+5a=2910 using a found above in this we have:
2c+5(630-c)=2910
2c+3150-5c=2910
-3c+3150=2910
-3c=-240
c=80
So 80 children attended the concert.
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