Question: What is the solution?

Solve 53 = -50*t + 3 for t.

Answer: -1

Question: What is the solution?

Solve 20*b - 87 + 144 - 77 = 0 for b.

Answer: 1

Question: What is the solution?

Solve 547*i - 553*i - 3 = -21 for i.

Answer: 3

Question: What is the solution?

Solve 11*u - 35 = 4*u for u.

Answer:
5