Question: What is the solution?

Solve 23*x + 6479 = -15*x + 6289 for x.

Answer: -5

Question: What is the solution?

Solve -1455*x - 903 = -2947*x + 1449*x for x.

Answer: 21

Question: What is the solution?

Solve 130*y + 3952 + 1961 - 4129 = -12906 for y.

Answer: -113

Question: What is the solution?

Solve 444*u - 895*u + 154 = -437*u for u.

Answer:
11