three times as many children as adults attended a concert on saturday. an adult ticket cost $7 and a child ticket cost $3. the theater collected a total of $6000. how many people bought tickets?

Question

three times as many children as adults attended a concert on saturday.  an adult ticket cost $7 and a child ticket cost $3.  the theater collected a total of $6000.  how many people bought tickets?

Steve · Answer

a = 3c 7a+3c = 6000 8a = 6000 a = 750 so, c=?

milly · Answer

how did you get #8a, can you help me step by step please

Steve · Answer

oops. "three times as many children as adults " means c=3a so, adding up the cost of the tickets, we have 7a+3c = 6000 7a+3(3a) = 6000 7a+9a = 6000 16a = 6000 a = 375

milly · Answer

its 5th grade math, what other way can i show it