Question 975648
1.{{{X+Y=50}}}
2.{{{15X+35Y=1150}}}
From eq. 1,
{{{15X+15Y=750}}}
Subtract from eq. 2,
{{{15X+35Y-15X-15Y=1150-750}}}
{{{20Y=400}}}
{{{Y=20}}}
Then,
{{{X+20=50}}}
{{{X=30}}}
30 $15 tickets and 20 $35 tickets