Question: What is the solution?

Solve -402*f - 36 = -393*f for f.

Answer: -4

Question: What is the solution?

Solve 2548*d - 2146*d = 7638 for d.

Answer: 19

Question: What is the solution?

Solve 25402 = -5179*q - 50052 + 13306 for q.

Answer: -12

Question: What is the solution?

Solve 0 = 11*d - 55 + 44 for d.

Answer:
1