Question: What is the solution?

Solve -73*r - 15020515 + 15016427 = 0 for r.

Answer: -56

Question: What is the solution?

Solve -26*y + 65*y = -26*y + 1040 for y.

Answer: 16

Question: What is the solution?

Solve 639*f + 11772 = 203*f for f.

Answer: -27

Question: What is the solution?

Solve -65*d = 237*d + 12382 for d.

Answer:
-41