QUESTION: Math problem: Solve -21*f = -47*f - 49*f + 225 for f.
ANS: 3
QUESTION: Math problem: Solve 7*s + 8*s = -169 + 259 for s.
ANS: 6
QUESTION: Math problem: Solve -260*d - 4954 - 34365 = 700*d + 4841 for d.
ANS: -46
QUESTION: Math problem: Solve 87 - 137 = 73*u + 96 for u.
ANS:
-2