Question: What is the solution?

Solve -7*j = 2161 - 2140 for j.

Answer: -3

Question: What is the solution?

Solve -1831*r - 16 = -1892*r - 809 for r.

Answer: -13

Question: What is the solution?

Solve 236 - 702 - 2624 = 206*v for v.

Answer: -15

Question: What is the solution?

Solve 11*w - 8 = 9*w for w.

Answer:
4