math
posted by Valentin .
student tickets to the school musical cost $3 each. All other tickets cost $5 each. Suppose that 272 tickets were sold for a total of $1120. How many tickets of each type were sold?

first we represent unknowns with variables.
let x = number of $3tickets
since the total number of tickets ($3 and $5) is equal to 272,
let 272x = number of $5tickets
then we setup the equation. to get the total cost, we multiply each price of the ticket with their number. thus,
3x + 5(272x) = 1120
3x + 1360  5x = 1120
3x  5x = 1120  1360
2x = 240
x = 120 (number of $3tickets)
272x = 152 (number of $5tickets)
hope this helps~ :)
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