Question: What is the solution?

Solve 2 - 2 = 13*d for d.

Answer: 0

Question: What is the solution?

Solve -18 = -7*m + 10 - 49 for m.

Answer: -3

Question: What is the solution?

Solve 50*f + 8 = 52*f for f.

Answer: 4

Question: What is the solution?

Solve 1526*t + 462*t + 27864 = 440*t for t.

Answer:
-18