Question: What is the solution?

Solve 4*v + 10*v + 84 = 0 for v.

Answer: -6

Question: What is the solution?

Solve -163 + 911 = -7247*b + 7264*b for b.

Answer: 44

Question: What is the solution?

Solve -1984*l - 1820*l - 1140 - 164689 = -21277 for l.

Answer: -38

Question: What is the solution?

Solve -6*z = -7*z + 1 for z.

Answer:
1