Question:
Solve 62*y = -133 + 381 for y..

Answer:
4

Question:
Solve -k - 2 = -2*k for k..

Answer:
2

Question:
Solve -180 = -24*r - 12*r for r..

Answer:
5

Question:
Solve 0 = 141*c - 215*c + 518 for c..

Answer:
7