Question:
Solve -4*z - 52 = -56 for z..

Answer:
1

Question:
Solve 30*f = 17*f - 182 for f..

Answer:
-14

Question:
Solve -9*r = -19*r + 20 for r..

Answer:
2

Question:
Solve -2735*t = -1354*t - 1351*t - 540 for t..

Answer:
18