QUESTION: Math problem: Solve 0 = 213*p - 190*p - 46 for p.
ANS: 2
QUESTION: Math problem: Solve -46*u + 91*u + 42 = 43*u for u.
ANS: -21
QUESTION: Math problem: Solve -16*n + 1 = -17*n for n.
ANS: -1
QUESTION: Math problem: Solve 413 - 1415 - 384 = -77*f for f.
ANS:
18