Question: What is the solution?

Solve -174*a + 321 = -250*a + 1005 for a.

Answer: 9

Question: What is the solution?

Solve 14*n + 5 = 9*n for n.

Answer: -1

Question: What is the solution?

Solve 577*i - 1092*i = -674*i - 5088 for i.

Answer: -32

Question: What is the solution?

Solve 783*y + 7950 = -6144 for y.

Answer:
-18