Question: What is the solution?

Solve 7*n + 4 = 9*n for n.

Answer: 2

Question: What is the solution?

Solve 380*i + 273*i - 20691 = -3060 for i.

Answer: 27

Question: What is the solution?

Solve -103 = -48*t - 391 for t.

Answer: -6

Question: What is the solution?

Solve -1364*a - 98960 - 12888 = 0 for a.

Answer:
-82