number of $5 tickets --- x
number of $10 tickets --- y
number of $15 tickets ---- 180-x-y
x + (180-x-y) = 2y
x + 180 - x - y = 2y
180=3y
y = 60
income equation:
5x + 10y + 15(180-x-y) = 1900
5x + 600 + 15(120-x) = 1900
5x - 15x + 600 + 1800 = 1900
-10x = -500
x = 50
x=50
y=60
number of $5 tickets --- 50
number of $10 ---------60
numbr of $15 = 180-50-60 = 70
at a college function a total of 180 tickets were sold. the tickets were priced at $5,10,15 and the money collected that day was $1,900. the sum of the numbers of $5,and $15 tickets sold was twice the number of $10 tickets sold. find the number of each type of ticket sold for a college function
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