QUESTION: Math problem: Solve -13*m + 18*m + 15 = 0 for m.
ANS: -3
QUESTION: Math problem: Solve -555*n + 559*n = 4 for n.
ANS: 1
QUESTION: Math problem: Solve -2399 - 1085 = -585*r + 6678 + 368 for r.
ANS: 18
QUESTION: Math problem: Solve 186 = 50*m - 14 for m.
ANS:
4