Question 1199504
Price of one adult ticket, y.
Price of student ticket, x.


{{{system(6x+y=60,15x+6y=192)}}}



Questions asks for just the value of y.  Try to eliminate x.


{{{system(6x+y=60,5x+2y=64)}}}, this form of the system does not help.



Back to the original system
5*E1 and 2*E2.


{{{system(30x+5y=300,30x+12y=384)}}}


{{{E2-E1}}}:
{{{7y=84}}}

{{{highlight(y=12)}}}