QUESTION: Math problem: Solve 10*d - 12*d - 6 = 0 for d.
ANS: -3
QUESTION: Math problem: Solve 521*m - 251*m - 251*m = 0 for m.
ANS: 0
QUESTION: Math problem: Solve -67 = 6*k - 91 for k.
ANS: 4
QUESTION: Math problem: Solve -172*a = 205*a + 136*a - 26*a + 32629 for a.
ANS:
-67