Question 1114059
Assume "a" adult tickers and "c" children's tickets are sold. Then


Total Revenue: {{{15a+5c=1610}}} 


{{{a=2c}}} (Given parameter)


Substitute: {{{15*2c+5c=1610}}}


Solve for c: {{{c= 46}}}


46 children's tickets and 92 adult tickets are sold (Answer)