QUESTION: Math problem: Solve 0 = 538*f - 537*f for f.
ANS: 0
QUESTION: Math problem: Solve -2*i + 8 = 2 for i.
ANS: 3
QUESTION: Math problem: Solve 5 = o + 7 for o.
ANS: -2
QUESTION: Math problem: Solve 0 = -0*k + 2*k + 3*k for k.
ANS:
0