QUESTION: Math problem: Solve -29*k + 364 = 21*k - 22*k for k.
ANS: 13
QUESTION: Math problem: Solve -5*u + u = 20 for u.
ANS: -5
QUESTION: Math problem: Solve 0 = 21*l + 56 - 35 for l.
ANS: -1
QUESTION: Math problem: Solve -20 = k - 23 for k.
ANS:
3