QUESTION: Math problem: Solve 20*u = -39*u - 118 for u.
ANS: -2
QUESTION: Math problem: Solve 82 = -2*t + 78 for t.
ANS: -2
QUESTION: Math problem: Solve -9*r - 4*r - 69*r = -5*r for r.
ANS: 0
QUESTION: Math problem: Solve 25*i = 159402 - 158827 for i.
ANS:
23