QUESTION: Math problem: Solve -23*c + 252 = 38*c - 419 for c.
ANS: 11
QUESTION: Math problem: Solve 7 - 5 = -2*u + 12 for u.
ANS: 5
QUESTION: Math problem: Solve 3*z = 4*z + 2 for z.
ANS: -2
QUESTION: Math problem: Solve 178*r = 174*r + 20 for r.
ANS:
5