QUESTION: Math problem: Solve 0 = -13*s + s - 12 for s.
ANS: -1
QUESTION: Math problem: Solve 0 = 10*z - 13*z + 12 for z.
ANS: 4
QUESTION: Math problem: Solve -17*w + 32 + 19 = 0 for w.
ANS: 3
QUESTION: Math problem: Solve -30*d - 42*d = 29*d - 0*d - 5*d for d.
ANS:
0