Question: What is the solution?

Solve 4 = 6*n + 16 for n.

Answer: -2

Question: What is the solution?

Solve -21*v + 91*v = -41*v + 888 for v.

Answer: 8

Question: What is the solution?

Solve 4770 = -56198*r + 56288*r for r.

Answer: 53

Question: What is the solution?

Solve 0 = -796*v - 1568*v - 1300*v - 545*v - 54717 for v.

Answer:
-13