Question: What is the solution?

Solve 19*o - 59*o - 80 = 0 for o.

Answer: -2

Question: What is the solution?

Solve 0 = 97*k - 664 - 209 for k.

Answer: 9

Question: What is the solution?

Solve 1072 - 2 = -275*a - 1130 for a.

Answer: -8

Question: What is the solution?

Solve -104575 + 216755 - 125524 = -96*u for u.

Answer:
139