Answer:
Adult ticket=$2
Student ticket=$1
Step-by-step explanation:
Let the cost of one adult ticket be $x and the cost of one student ticket be $y
Fred bought 7 adult and 2 student tickets for$16.
So,
7x+2y=16. ...(1)
And,John paid $7 for one adult and 5 student tickets.
So,
x+5y=7. ...(2)
From ...(2),
x=7-5y
Substituting the value of x in equation ...(1),
7(7-5y)+2y=16
or,49-35y+2y=16
or,33y=33
or,y=1
Now, substituting the value of y in ...(2),
x=7-5=2
Thus,the cost of one adult ticket is $2 and the cost of one student ticket is $1.
