Question: What is the solution?

Solve -28*r - 3*r = 0 for r.

Answer: 0

Question: What is the solution?

Solve 720 = 74009*v - 74039*v for v.

Answer: -24

Question: What is the solution?

Solve -10118*l + 3060 = -10028*l for l.

Answer: 34

Question: What is the solution?

Solve 175*w + 1897 = -1603 for w.

Answer:
-20