Question

tickets to a school basketball game cost $4 for students and $7 for adults. At the end of the night, 168 tickets are sold for a total of $861. How many student tickets are sold?

Answer 1

s+a=168
4s+7a=861
s=-a+168
-4a+672+7a=861
3a=189
a=63
s=105
There are 105 student tickets