Question:
Solve o - 19 + 40 = 11 for o..

Answer:
-10

Question:
Solve 3835 - 53 = -1891*t for t..

Answer:
-2

Question:
Solve -5828 - 5147 = -288*b + 1409 for b..

Answer:
43

Question:
Solve 0 = -561*a + 560*a for a..

Answer:
0