Question:
Solve -164 = 84*u - 66 - 1946 for u..

Answer:
22

Question:
Solve -1302*s = -1288*s - 70 for s..

Answer:
5

Question:
Solve -7*o + 28 = -0*o for o..

Answer:
4

Question:
Solve -5*d + 14 = 4 for d..

Answer:
2