Question:
Solve -30*t = -13*t - 85 for t..

Answer:
5

Question:
Solve 959*s = 953*s + 60 for s..

Answer:
10

Question:
Solve -17*m = -6*m - 55 for m..

Answer:
5

Question:
Solve -104*u - 495 = -159*u for u..

Answer:
9