Question:
Solve 9*d - 13*d + 24 = 0 for d..

Answer:
6

Question:
Solve -n = 7 - 0 + 5 for n..

Answer:
-12

Question:
Solve -102*v + 11515 = -23*v + 156*v for v..

Answer:
49

Question:
Solve 20*x = 8*x + 48 for x..

Answer:
4