Question 132933
Hanson 5A + 2C = 129.00
Riv    2A + 6C = 107.50


Multiply Hanson equation by 3 to yield

15A + 6C = 387
 2A + 6C = 107.50

Subtract to get
 13A = 279.50
 A = 21.5  So adult tix cost 21.50 each


Now find child tix price
2 (21.50) + 6C = 107.50
6C = 64.50
 C = 10.75   Child tix are 10.75 each


Check your answer by substiting these values for A and C back into the Hansons