math
posted by ava .
a school's chorus bought 30 tickets to a play. total cost of tickets $98. if student tickets cost $3 and each adult tickets cost $5, how many adults are going with the chorus?
thanks

It's a system of equations
Let's say that students = x,and that adults = y
Now let's construct the system of equations:
x + y = 30
3x + 5y = 98
Let's work by substitution with the first equation:
x = 30  y
Lets the expression above in the second equation:
3(30y)+5y=98
Now we solve for y:
903y+5y=98
3y+5y=9890
2y=8
y = 8/2
y = 4
So we said that y represent the number of adults, so we have 4 adults.
304= 26 students
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