Question: What is the solution?

Solve -34 + 39 = -s for s.

Answer: -5

Question: What is the solution?

Solve 64*a = 83*a + 21*a + 195*a - 4935 for a.

Answer: 21

Question: What is the solution?

Solve -16*j + 1239 - 1159 = 0 for j.

Answer: 5

Question: What is the solution?

Solve -9701*o + 23760 = -10229*o for o.

Answer:
-45