Question 1077610
x, how many $10 tickets
y, how many $20 tickets
z, how many $30 VIP tickets


Follow the description.
{{{system(x+y+z=3343,y-x=113,10x+20y+30z=62350)}}}


Three linear equations in three unknown variables, so solve the system.
You would want to simplify the sales equation to {{{x+2y+3z=6235}}}, and the second equation maybe as  {{{-x+y=113}}}.


Work with THIS system:
{{{system(x+y+z=3343,-x+y=113,x+2y+3z=6235)}}}



One path to begin can be, add first and second equations to form a new equation; and add the second and third equations to form another new equation.  This eliminates x, and your two new equations are in just the two variables, y and z.