Question:
Solve -6 = 4*x - 18 for x..

Answer:
3

Question:
Solve 1645 - 1 = 199*f + 52 for f..

Answer:
8

Question:
Solve 0 = -27*g - 18*g + 225 for g..

Answer:
5

Question:
Solve 10*m - 3 = 9*m for m..

Answer:
3