algebra 1
posted by jackson .
The attendance at a baseball game was 400 people. Student tickets cost $2 and adult tickets cost $3. Total ticket sales were $1050. How many tickets of each type were sold?

Let s = student tickets and a = adult tickets.
s + a = 400, so s = 400a
2s + 3a = 1050
Substitute 400a for s in second equation and solve for a. Insert that value into the first equation and solve for s. Check by inserting both values into the second equation. 
AT A HIGH SCHOOL BASKETBALL GAME; 500 TICKET WERE SOLD. ADULT TICKETS COST $5.50 AND STUDENT TICKET COST $3.50 IF THE TOTAL AMOUNT COLLECTED WAS 2200. HOW MANY STUDENT TICKET WERE SOLD AND HOW MANY ADULT TICKET WERE SOLD