Question: What is the solution?

Solve -1565 + 1551 = -7*l for l.

Answer: 2

Question: What is the solution?

Solve -261*u + 114*u + 78 = -134*u for u.

Answer: 6

Question: What is the solution?

Solve -127 + 638 = -42*x + 1225 for x.

Answer: 17

Question: What is the solution?

Solve 519*y = 508*y + 253 for y.

Answer:
23