A cashier collected $312 from the sale of 50 tickets. An adult ticket cost $8. A child ticket cost $4. How many tickets of each type did th

a = adult tix                         price total = $ 8a

c = child tix = 50 - a             price total = $ 4 (50-a)           summed , they equal $312

 

8a      +      4(50-a)          =    312

4a      +       200                = 312

a = 28           then   c = 50 -a = 22