QUESTION: Math problem: Solve -8*r + 14 = 38 for r.
ANS: -3
QUESTION: Math problem: Solve -138*d + 33*d - 4620 = 141*d - 15*d for d.
ANS: -20
QUESTION: Math problem: Solve 37*d - 206171 + 206504 = 0 for d.
ANS: -9
QUESTION: Math problem: Solve 21*p - 9*p + 120 = -8*p for p.
ANS:
-6