Question 582188
C.) 10a + 2c = 46
a + c = 7 

a + c = 7 (total tickets must be 7)

10a + 2c = 46 (cost equation)

*[invoke linear "a", "c", 1, 1, 7, 10, 2, 46 ]

4 adult tickets, ($40) and 3 child tickets ($6)