Question:
Solve 27*o - 13*o = -21*o + 1520 + 580 for o..

Answer:
60

Question:
Solve -10511 + 33703 = -3767*a + 3990*a for a..

Answer:
104

Question:
Solve 775 - 475 = -224*o + 3212 for o..

Answer:
13

Question:
Solve 29*v + 6*v = -6 + 76 for v..

Answer:
2