Question: What is the solution?

Solve -4086 + 223442 + 125463 = -11291*u - 140694 for u.

Answer: -43

Question: What is the solution?

Solve 17*l - 2 = 15*l for l.

Answer: 1

Question: What is the solution?

Solve l + 147 = 148 for l.

Answer: 1

Question: What is the solution?

Solve 1405 - 336 + 119 = -54*a for a.

Answer:
-22