9-2n=14 - 2n
can someone tell me what n equals

9-2n=14 - 2n

Move -2n to the left side. Sign changes from -2n to +2n.

9-2n+2n= 14-2n+2n

9= 14-2n+2n

9= 14

no solution

Hello! So, 9:30 AM was when practice started, and it went all the way to 1:15 PM. We can eliminate A and C, because that's too little time. When you do a bit of math, 9:30 and 1:30 are 4 hours apart and 1:15 is 15 minutes from 1:30. If you do a bit more math, you'll see that practice lasted for 3 hours and 45 minutes. Therefore, the answer is D.