To find x, you divide both sides of the equation by 12.20. This would look like this: 12.20x/12.20 =372.10/12.20 . Then, the answer you get is 30.5, so. X=30.5
2. Next you use the inverse of division, then you take 12.20 and the variable x and divide it with 372.10, so it would look like this ( 12.20 x 372.10/372.10) and then after you do that, you equal off the equation by putting 372.10 divided by 12.20( 372.10/12.20).
3. Now you do x equals 372.10/ divided by 12.20 ( x = 372.10/12.20).
4. Finally after you divide 372.10 by 12.20, Your answer will be 30.5
Curt because if his time was 8/9 of Ian's time then that means he ran the mile in a fraction of Ian's time, so he finished the mile quicker. Curt ran faster.