Question: What is the solution?

Solve 104590*v = 105042*v + 29380 for v.

Answer: -65

Question: What is the solution?

Solve 153375 = 3280*a + 1002*a - 174653 + 75390 for a.

Answer: 59

Question: What is the solution?

Solve -68*h + 75*h = -7 for h.

Answer: -1

Question: What is the solution?

Solve -505*r - 36 = -508*r for r.

Answer:
12