10 will be your answer because 4 x 5 divided by 2 is 10
It would cost $35 because 10.50 divided by 3 = 3.5x10=35
Question:
Trent had $20.
He now has $7.50 left.
Let N = price per notebook.
N = (20.00 - 7.50)/5
N = $2.50
Each notebook sells for $2.50.