-5 follows 7 and 5 is and odd number
Let x equal the number of adult tickets sold.
X + 3X=512
(I put 3x because we know the students sold 3 times as many).
Solve for X.
X+3X=512
4X=512
4X/4=512/4
X=128
By using dimensional analysis, this problem can be simple.
B
The answer is A i believe