Question:
Solve a - 2 = 2*a for a..

Answer:
-2

Question:
Solve 17400 = -314*o - 221*o + 303*o for o..

Answer:
-75

Question:
Solve -24 = 556*a - 564*a for a..

Answer:
3

Question:
Solve -16*v - 8*v = -2*v - 26*v - 64 for v..

Answer:
-16