QUESTION: Math problem: Solve 51*z + 9*z - 186*z = 197*z - 323 for z.
ANS: 1
QUESTION: Math problem: Solve -150*a + 11*a + 227 + 51 = 0 for a.
ANS: 2
QUESTION: Math problem: Solve -24*c + 165644 - 164804 = 0 for c.
ANS: 35
QUESTION: Math problem: Solve 15 = 21*c + 36 for c.
ANS:
-1