Multi-Step:
Step 1 - Subtract 11n from both sides:
13n - 11n - 13 = 11n - 11n + 25
2n - 13 = n + 25
Step 2 - Add 13 to both sides:
2n - 13 + 13 = 25 + 13
2n = 38
Step 3 - Divide both sides by 2
2n/2 = 38/2
n = 19
I'm not quite sure what the two-step version would be, but this is the multi-step part of it. If someone else could help solve for the two-step, that'd be great! I hope this helped, though :)