Given:
Total number of tickets = 353
Single ticket = $92
Family ticket = $122
Total sales = $39946
To find:
The number of family tickets.
Solution:
Let x be the number of single tickets and y be the number of family tickets.
Total tickets: [tex]x+y=353[/tex] ...(i)
Total sales: [tex]92x+122y=39946[/tex] ...(ii)
Multiply (i) by 92 and subtract the result from (ii).
[tex]92x+122y-92(x+y)=39946-92(353)[/tex]
[tex]92x+122y-92x-92y=39946-32476[/tex]
[tex]30y=7470[/tex]
Divide both sides by 30.
[tex]y=\dfrac{7470}{30}[/tex]
[tex]y=249[/tex]
Therefore, the number of family tickets is 249.