QUESTION: Math problem: Solve 213*d - 17136 = -739*d for d.
ANS: 18
QUESTION: Math problem: Solve 27*o + 6 = 24*o for o.
ANS: -2
QUESTION: Math problem: Solve 1057 + 826 = -3616*f - 5349 for f.
ANS: -2
QUESTION: Math problem: Solve -4*c + 618 = -107*c for c.
ANS:
-6