Question: What is the solution?

Solve 0 = -6901*t + 6904*t + 39 for t.

Answer: -13

Question: What is the solution?

Solve -7*d = -8*d for d.

Answer: 0

Question: What is the solution?

Solve -7*s + 8*s - 2 = 0 for s.

Answer: 2

Question: What is the solution?

Solve 8530 = 36*b + 10006 for b.

Answer:
-41