QUESTION: Math problem: Solve 124*c + 429 = -31*c + 2134 for c.
ANS: 11
QUESTION: Math problem: Solve -107*r + 626*r - 41*r - 8788 = -198*r for r.
ANS: 13
QUESTION: Math problem: Solve -247 = -21*z - 14 - 128 for z.
ANS: 5
QUESTION: Math problem: Solve 9*i + 26 - 53 = 0 for i.
ANS:
3