Question: What is the solution?

Solve 6 - 30 = 6*f for f.

Answer: -4

Question: What is the solution?

Solve 218*m + 9476 = 630*m for m.

Answer: 23

Question: What is the solution?

Solve 89 + 283 = 31*l for l.

Answer: 12

Question: What is the solution?

Solve 0 = 6*z + 2*z - 24 for z.

Answer:
3