Dear Ajtocute, let's have x=9 Multiply 7 by 9 to get 63. Then, you divide 63 by 7 to get back to 9. You just cancel out the multiplication with division.
A should be the right answer. Hope this helped!
T × 1/4 which equals 7/8
T = 7/8 × 4 which equals 7/2
7/2 is your answer