QUESTION: Math problem: Solve -35 = 9*r + 28 - 117 for r.
ANS: 6
QUESTION: Math problem: Solve -28109 = 209*h + 78*h - 42746 for h.
ANS: 51
QUESTION: Math problem: Solve -142 = 19*o - 47 for o.
ANS: -5
QUESTION: Math problem: Solve -30*k - 338 - 103 = -21 for k.
ANS:
-14