QUESTION: Math problem: Solve -10*d - 112 = 18*d for d.
ANS: -4
QUESTION: Math problem: Solve 519*r - 516*r = 3 for r.
ANS: 1
QUESTION: Math problem: Solve 461*w + 1932 - 12180 = -27*w for w.
ANS: 21
QUESTION: Math problem: Solve -244*u + 82*u - 7200 = 139*u + 59*u for u.
ANS:
-20