Answer :

x - tickets for adults
y - for students

[tex]6x+4.5y=1155\\ x+y=240\\\\ 6x+4.5y=1155\\ -4.5x-4.5y=-1080\\ ----------\\ 1.5x=75\\ x=50\\\\ 50+y=240\\ y=190[/tex]

Other Questions