Tickets for a school play cost $5 if you buy them early, and $7 if you buy them the day of the show. If 200 tickets are sold, and the total amount of money from ticket sales was $1340, how many tickets were purchased early?

Question

anonymous · Answer

system schmistem lets call $x$ the number of early tickets, so $200-x$ is the number of late tickets
early tickets brought in $5x$ dollars and late tickets bring $7(200-x)$

anonymous · Answer

you could try an equation like x+y=200, and 5x+7y=1340

anonymous · Answer

since the total is $1340$ you can set 
$$5x+7(200-x)=1340$$ and solve for $x$

anonymous · Answer

thanks satellite can i ask you another question and you answer it please

anonymous · Answer

sure