Question: What is the solution?

Solve 407 - 82 = 25*z for z.

Answer: 13

Question: What is the solution?

Solve 0 = 10*i + 42 - 2 for i.

Answer: -4

Question: What is the solution?

Solve -2565306*t + 2565238*t = -3876 for t.

Answer: 57

Question: What is the solution?

Solve 0 = 2*b + 9 - 1 for b.

Answer:
-4