Question 852909
x = child ticket price
y = adult ticket price

3x+5y=108 the cost accounting for the first group.
10x+3y=155 the cost accounting for the second group.


Your choice how to continue.  Either substitution or elimination.  If choosing elimination, first EITHER eliminate x OR eliminate y.  


.
9x+15y=324 & 50x+15y=775.
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50x-9x=775-324
41x=451
x=11 and this means y=....
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5y=108-3x
5y=108-33=75
y=75/5
y=15
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SUMMARY: x=11, y=15.