QUESTION: Math problem: Solve -16372 - 33319 = -540*u - 471*u - 13295 for u.
ANS: 36
QUESTION: Math problem: Solve 0 = -231*x + 2108 + 433 for x.
ANS: 11
QUESTION: Math problem: Solve 13 = -4*r + 9 for r.
ANS: -1
QUESTION: Math problem: Solve 43*i + 15*i + 406 = 0 for i.
ANS:
-7