Question:
Solve 260 = 76*v - 50*v for v..

Answer:
10

Question:
Solve 1020*o + 223*o + 56600 = -730*o + 558*o for o..

Answer:
-40

Question:
Solve -62*o + 46409 = 74*o + 48041 for o..

Answer:
-12

Question:
Solve -48*s + 67*s - 496 = 81*s for s..

Answer:
-8