Question: What is the solution?

Solve 34*v - 18 = 25*v for v.

Answer: 2

Question: What is the solution?

Solve 639*f = 621*f + 144 for f.

Answer: 8

Question: What is the solution?

Solve 4*o + 13 = 1 for o.

Answer: -3

Question: What is the solution?

Solve j + 0*j = -10*j for j.

Answer:
0