algebra
posted by becky on .
Adult tickets for a play cost $16 and child tickets cost $5. If there were 22 people at a performance and the theater collected $275 from ticket sales, how many children attended the play?
A) 6
B) 7
C) 8
D) 15

Just substitute the numbers into your equation and see what works. For example, (A)if 6 children are going and there are 22 people, then there must be 16 adults. So, 16(16)+5(6)needs to equal 275. It doesn't, so it is not correct.
(B) 16(15)+5(7) if this equals 275, you have your answer. If that doesn't work you have to go ahead and do the rest. Good Luck! 
adult ticket 30$ child tcket 20$, 19 tickets sold total 460