Question: What is the solution?

Solve 42*o = 24 + 270 for o.

Answer: 7

Question: What is the solution?

Solve 4*c - 11*c - 35 = 0 for c.

Answer: -5

Question: What is the solution?

Solve -3479 - 166 = -248*a + 491*a for a.

Answer: -15

Question: What is the solution?

Solve 1004439*c = 1004443*c + 80 for c.

Answer:
-20