Question: What is the solution?

Solve -309*d + 33267 + 908 = 107*d - 769 for d.

Answer: 84

Question: What is the solution?

Solve -15620 - 117061 = -2823*z for z.

Answer: 47

Question: What is the solution?

Solve 4 = 91*s - 87*s for s.

Answer: 1

Question: What is the solution?

Solve 0 = 304*s - 314*s + 30 for s.

Answer:
3