Question: What is the solution?

Solve -13*n = -12*n + 11*n + 84 for n.

Answer: -7

Question: What is the solution?

Solve 27*i + 0 + 4 = 28*i for i.

Answer: 4

Question: What is the solution?

Solve -46*b = -38*b + 32 for b.

Answer: -4

Question: What is the solution?

Solve w - 5*w - 16 = 0 for w.

Answer:
-4