Question:
Solve -11*o + 15*o = 20 for o..

Answer:
5

Question:
Solve 575 = -295*y - 900 for y..

Answer:
-5

Question:
Solve 0 = -73224*o + 73375*o + 16610 for o..

Answer:
-110

Question:
Solve 2311*k = 1262*k - 4486*k + 802575 for k..

Answer:
145