Question: What is the solution?

Solve 0 = 7*s + 1 + 6 for s.

Answer: -1

Question: What is the solution?

Solve -7*z = -46*z + 312 for z.

Answer: 8

Question: What is the solution?

Solve -700*w + 1476 = 735*w - 2165*w + 694*w for w.

Answer: -41

Question: What is the solution?

Solve -22 + 26 = -2*z for z.

Answer:
-2