Question: What is the solution?

Solve a - 3*a + 21 = 27 for a.

Answer: -3

Question: What is the solution?

Solve 8691*q - 389265 = -102462 for q.

Answer: 33

Question: What is the solution?

Solve 0 = -4*x - 109 + 113 for x.

Answer: 1

Question: What is the solution?

Solve 22*v - 11 - 229 = 2*v for v.

Answer:
12