Question:
Solve -49*r + 57*r = 24 for r..

Answer:
3

Question:
Solve -14 = 13*k - 66 for k..

Answer:
4

Question:
Solve 2748*s + 3080 = 2888*s for s..

Answer:
22

Question:
Solve 0 = -4*v - 2315 + 2151 for v..

Answer:
-41