Question: What is the solution?

Solve -220 = 89*i - 67*i for i.

Answer: -10

Question: What is the solution?

Solve 0 = -54*o + 130*o - 76 for o.

Answer: 1

Question: What is the solution?

Solve 315 = -167*x + 132*x for x.

Answer: -9

Question: What is the solution?

Solve 72 + 24 = -24*t for t.

Answer:
-4