Question:
Solve -422 = 49*k - 1353 for k..

Answer:
19

Question:
Solve -1605*f - 1617*f = -3241*f + 323 for f..

Answer:
17

Question:
Solve 48 = 10*y - 12 for y..

Answer:
6

Question:
Solve 17*z = 24*z for z..

Answer:
0