Question:
Solve 90 = 38*o - 20*o for o..

Answer:
5

Question:
Solve 0 = 246*v - 278*v for v..

Answer:
0

Question:
Solve 97*t - 126 = 76*t for t..

Answer:
6

Question:
Solve 0 = 585*o - 6105 + 4524 - 12459 for o..

Answer:
24