QUESTION: Math problem: Solve 9 - 31 = 11*x for x.
ANS: -2
QUESTION: Math problem: Solve 0 = -704*r + 714*r - 10 for r.
ANS: 1
QUESTION: Math problem: Solve 17372 = -45394887*n + 45394715*n for n.
ANS: -101
QUESTION: Math problem: Solve -29*j = 27*j - 67*j - 143 for j.
ANS:
-13