Question:
Solve -47 = -z - 49 for z..

Answer:
-2

Question:
Solve -44*b + 84 = -30*b for b..

Answer:
6

Question:
Solve 1004 = 3*x + x + 1012 for x..

Answer:
-2

Question:
Solve -305*m + 1697*m = 24335 + 50833 for m..

Answer:
54