QUESTION: Math problem: Solve -81*c + 706 + 509 = 0 for c.
ANS: 15
QUESTION: Math problem: Solve 16*x - 116*x - 492 = 64*x for x.
ANS: -3
QUESTION: Math problem: Solve -25220*r = -22512*r + 54160 for r.
ANS: -20
QUESTION: Math problem: Solve -32 = -10*c - 2 for c.
ANS:
3