Question: What is the solution?

Solve -610*u = -1815 - 7335 for u.

Answer: 15

Question: What is the solution?

Solve 447 = 15*r + 612 for r.

Answer: -11

Question: What is the solution?

Solve -3418247 = -2*m - 3418179 for m.

Answer: 34

Question: What is the solution?

Solve -45*o - 153 = -1188 for o.

Answer:
23