QUESTION: Math problem: Solve 0 = -3*q - 4*q - 21 for q.
ANS: -3
QUESTION: Math problem: Solve -82*s - 1131 = 943 + 1007 - 375 for s.
ANS: -33
QUESTION: Math problem: Solve -112*d - 143*d - 57753 = 248*d + 210*d for d.
ANS: -81
QUESTION: Math problem: Solve 49*r - 15*r + 238 = 0 for r.
ANS:
-7