Question 1124703
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Let x be the number of lower level tickets and y be the number of upper level tickets.  Then the given information tells us<br>
(1) x+y = 6481  (the total number of tickets was 6481)
(2) 67x+73y = 461383  (the total cost of the tickets was 461383)<br>
With both equations in Ax+By=C form, the easiest way to solve the pair of equations is by elimination.<br>
--> multiply equation (1) by 67
--> subtract that new equation from equation (2), eliminating x
--> solve the resulting equation for y
--> substitute that value of y in equation (1) to solve for x