Question: What is the solution?

Solve 10763 = 687*r - 16717 for r.

Answer: 40

Question: What is the solution?

Solve 204*m - 139 + 3199 = 0 for m.

Answer: -15

Question: What is the solution?

Solve 380*a - 381*a + 5 = 0 for a.

Answer: 5

Question: What is the solution?

Solve -27*w = -59*w + 33*w for w.

Answer:
0