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s- student, price of ticket is $2

a- adult, price for ticket i s$ 3

2*s money collected from students

3*s money collected from adults

if a+s=400

and 3*a+2*s=1050

we have system of linear equations

so a=400-s

substitute in second equation a with 400-s

then 3*(400-s) +2*s=1050

1200-3*s +2s=1050

1200 - s = 1050

-1200 -1200

-s = - 150

s=150

if s=150 then a=400-s so a=400-150, thus a=250

At the game sold 250 adult tickets and 150 student tickets

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Q: The attendance at a ball game was 400 people Student tickets are 2 and Adult tickets are 3 If 1050 was collected in ticket sales how many of each type of ticket were sold?
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