The admission fee to the Michigan State Fair is $6 for children and 4 dollars for adults. On the first day, 220 people entered the fair and $1250 was collected. How many children and how many adults attended the fair?
c = children tix value = $ 6 c
a = adult tix = (220-c) value = $ 4 (220-c) summed they equal 1250
6c + 4 (220-c) = 1250 solve for c then a = 220 - c