QUESTION: Math problem: Solve 3*z - 29 + 20 = 0 for z.
ANS: 3
QUESTION: Math problem: Solve 1479*i - 5540 = 938*i + 5821 for i.
ANS: 21
QUESTION: Math problem: Solve -16*d = 36*d + 18*d + 420 for d.
ANS: -6
QUESTION: Math problem: Solve -15 = -c + 6*c for c.
ANS:
-3