QUESTION: Math problem: Solve 0 = -65*j + 72*j + 133 for j.
ANS: -19
QUESTION: Math problem: Solve 291*n = 46*n - 109 - 381 for n.
ANS: -2
QUESTION: Math problem: Solve -3409*c = -4219*c - 8100 for c.
ANS: -10
QUESTION: Math problem: Solve -24 = 7*r - 15*r for r.
ANS:
3