Question: What is the solution?

Solve 72*z = 67*z for z.

Answer: 0

Question: What is the solution?

Solve -4*q + 0*q = -20 for q.

Answer: 5

Question: What is the solution?

Solve 0*w + 5*w = 20 for w.

Answer: 4

Question: What is the solution?

Solve -2*k + 23 - 17 = 0 for k.

Answer:
3