Question: What is the solution?

Solve 0 = 12*d + 8 + 16 for d.

Answer: -2

Question: What is the solution?

Solve 0 = -30*w + 42 - 12 for w.

Answer: 1

Question: What is the solution?

Solve 0 = 605*b + 10940 - 59945 for b.

Answer: 81

Question: What is the solution?

Solve -632*q = 10276 + 2996 for q.

Answer:
-21