Question: What is the solution?

Solve 4121*w - 636888 = -4567*w + 1106*w for w.

Answer: 84

Question: What is the solution?

Solve -69397*a = -69362*a + 35 for a.

Answer: -1

Question: What is the solution?

Solve -3933*w - 1290 = -3890*w for w.

Answer: -30

Question: What is the solution?

Solve 0 = -12*a - 58 - 54 - 32 for a.

Answer:
-12