QUESTION: Math problem: Solve 0 = -143*z + 38*z - 0 for z.
ANS: 0
QUESTION: Math problem: Solve -90*w + 1146 = 306*w - 42 for w.
ANS: 3
QUESTION: Math problem: Solve -6*y - 45 = -21*y for y.
ANS: 3
QUESTION: Math problem: Solve -134*u - 30*u = -1804 for u.
ANS:
11