Irene R. answered 01/20/20
BS in Mechanical Engineering and Certified math teacher for 13 years
Let's use the variable s to represent the NUMBER of student tickets and the variable x represent the NUMBER of non-student tickets. Since there are a total of 511 tickets , we can write:
s + x = 511
Then since it costs $4 for each student ticket and $6 for each non-student ticket, we can represent the total money spent by:
4s + 6x = $2408
To solve these two equations with two unknowns, use substitution.
From the first equation we can write that s = 511 - x
Substitute this expression for s into the second equation:
4s + 6x = $2408
4 (511 - x) + 6x = 2408
2044 - 4x + 6x = 2408
2044 + 2x = 2408
2044 + 2x - 2044= 2408 - 2044
2x = 364
x = 182
Therefore, 182 non-student tickets were sold.
The number of student tickets will be 511 - 182 or 329 student tickets.
To verify: 4 * 329 + 6 * 182 = 1316 + 1092 = 2408