Question: What is the solution?

Solve -2 - 1 = -d for d.

Answer: 3

Question: What is the solution?

Solve 8*s + 12 = 14*s for s.

Answer: 2

Question: What is the solution?

Solve -149*i + 336 = -101*i for i.

Answer: 7

Question: What is the solution?

Solve -106*n = -100*n + 6 for n.

Answer:
-1