QUESTION: Math problem: Solve 0 = -2*s + 10 - 2 for s.
ANS: 4
QUESTION: Math problem: Solve 36*b + 270 = 81*b for b.
ANS: 6
QUESTION: Math problem: Solve -170*k + 174*k + 24 = 0 for k.
ANS: -6
QUESTION: Math problem: Solve -3*w = -w + 4*w - 30 for w.
ANS:
5