Question:
Solve -10 = -2*v - 10 for v..

Answer:
0

Question:
Solve 0 = -137*d + 299*d + 810 for d..

Answer:
-5

Question:
Solve -104*d = -423 - 814 - 219 for d..

Answer:
14

Question:
Solve 1831*k + 950 + 55291 = 93797 + 149206 for k..

Answer:
102