Tickets for the school concert were 3$ and 2$. If 245 tickets were sold for a total of $630, how much of each kind were sold?

2x + 3y = 630

x + y = 245 then you want to get rid of x so in the second equation * by - 2 and get - 2x - 2y = - 490 subtract this equation from the first to get y=$140 substitute 140 in for y and get x = $105 and 2x=210 and 3y=420 210 + 420=630