Q: What is the solution?
Solve 0 = 498*r - 490*r - 2 + 42 for r.

A: -5

Q: What is the solution?
Solve -4*p = -150 + 170 for p.

A: -5

Q: What is the solution?
Solve 0 = -800775*n + 800924*n + 1788 for n.

A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
-12