QUESTION: Math problem: Solve -5*v = 12*v - 0*v for v.
ANS: 0
QUESTION: Math problem: Solve 0 = -54*d + 5249 - 3359 for d.
ANS: 35
QUESTION: Math problem: Solve -9111 + 9479 = 16*c for c.
ANS: 23
QUESTION: Math problem: Solve -31*r + 156 = -83*r for r.
ANS:
-3