QUESTION: Math problem: Solve 2151 = 140*p + 4391 for p.
ANS: -16
QUESTION: Math problem: Solve 5*x + 628 + 45 = 30*x + 223 for x.
ANS: 18
QUESTION: Math problem: Solve -8 = -v - 12 for v.
ANS: -4
QUESTION: Math problem: Solve 0 = -4*f - 2*f - 12 for f.
ANS:
-2