QUESTION: Math problem: Solve 181*r - 2142 = -513 for r.
ANS: 9
QUESTION: Math problem: Solve 0 = -469*h + 511*h + 462 for h.
ANS: -11
QUESTION: Math problem: Solve 6012 = 128*s + 2691 - 2055 for s.
ANS: 42
QUESTION: Math problem: Solve 1440 + 186 = -110*s + 196 for s.
ANS:
-13