Question: What is the solution?

Solve 67*v = 50*v - 102 for v.

Answer: -6

Question: What is the solution?

Solve -1643*c = -1651*c - 64 for c.

Answer: -8

Question: What is the solution?

Solve -13*a = -75*a + 248 for a.

Answer: 4

Question: What is the solution?

Solve 427 = -4*a + 455 for a.

Answer:
7