Question 275313
Let adult cost be A and childrens' cost be C
Then 5A + 8C = 4850
and  4A + 12C = 5700
Multiply 1 by 3 and 2 by 2
15A + 24C = 14550
8A  + 24C = 11400 so, subtracting
7A = 3150
A = 450 or $4.50
Substituting in 1
5 x 450 + 8C = 4850
2250 +8C = 4850
8C = 2600
C = 325
So Adult tickets cost $4.50 and Childrens' tickets cost £3.25