Question:
Solve -1841 - 46 = -388*x + 1217 for x..

Answer:
8

Question:
Solve -520*n + 478*n + 207 = 1593 for n..

Answer:
-33

Question:
Solve -3098*r + 2421 + 13069 = 0 for r..

Answer:
5

Question:
Solve 0 = -6715*r + 411301 + 85609 for r..

Answer:
74