QUESTION: Math problem: Solve 123*u = 22853 - 13136 for u.
ANS: 79
QUESTION: Math problem: Solve 355 + 2552 + 4252 = -4139*x - 1119 for x.
ANS: -2
QUESTION: Math problem: Solve -13*d - 104 = 13*d for d.
ANS: -4
QUESTION: Math problem: Solve 635*f - 25284 = -268*f for f.
ANS:
28