child admission is $5.80 and adult admission is $9.90 . On Monday, four times as many adult tickets as child tickets were sold, for a tot

Question

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Answer 1

5.8C + 9.9A = T= total revenue

A=4C

5.8C + 9.9(4C) = T

5.8C + 39.6C = T

45.4C = T

C = T/45.4 = number of child tickets

A = 4T/45.4 = number of adult ticketsC

You just need to know the total ticket sales revenue to calculate the exact number of tickets sold, or just the total number of tickets sold.

IF you knew the total ticket sales that would give you another equation: A+C = T = total tickets

then use that with A =4C to get 5C =T, C=T/5 and A = 4T/5