At the city museum, child admission is $5.20 and adult admission is $9.90. On Sunday, 173 tickets were sold for a total sales of $1270.90 How many child tickets were sold that day?

Answer 1

X+y = 173

5.2X + 9.9y = 1270.9

5.2x + 9.9(173-x) = 1270.9

5.2x + 1712.7 - 9.9x = 1270.9

-4.7x = -441.8

x =94

y = 79