Question: What is the solution?

Solve -23*u - 45 = -22 for u.

Answer: -1

Question: What is the solution?

Solve 0 = m - 4 + 3 - 1 for m.

Answer: 2

Question: What is the solution?

Solve -60*h = -9*h - 30*h for h.

Answer: 0

Question: What is the solution?

Solve 2*u - 134 + 92 = -88 for u.

Answer:
-23