QUESTION: Math problem: Solve -39 = -21*q - 19 - 83 for q.
ANS: -3
QUESTION: Math problem: Solve 549*k - 42971 + 113167 - 50432 = 0 for k.
ANS: -36
QUESTION: Math problem: Solve 20 - 84 = 16*b for b.
ANS: -4
QUESTION: Math problem: Solve -19*r - 1791 = -57*r - 1753 for r.
ANS:
1