Question: What is the solution?

Solve 82*o + 662 - 124 = -816 - 532 for o.

Answer: -23

Question: What is the solution?

Solve 0 = z + 624 - 617 for z.

Answer: -7

Question: What is the solution?

Solve 0 = -7*f - 7 - 0 for f.

Answer: -1

Question: What is the solution?

Solve 56*d + 16 = 60*d for d.

Answer:
4