QUESTION: Math problem: Solve 53*r = 66*r - 104 for r.
ANS: 8
QUESTION: Math problem: Solve -491*n - 288 - 4131 = 0 for n.
ANS: -9
QUESTION: Math problem: Solve 657 = -315*a + 4752 for a.
ANS: 13
QUESTION: Math problem: Solve 25*j - 123*j - 10*j - 7590 = 7*j for j.
ANS:
-66