QUESTION: Math problem: Solve 65*d = -40*d + 315 for d.
ANS: 3
QUESTION: Math problem: Solve -24*r - 15 = -27*r for r.
ANS: 5
QUESTION: Math problem: Solve 3 = 4*r - 12 + 15 for r.
ANS: 0
QUESTION: Math problem: Solve -12 = 2*m - 6 for m.
ANS:
-3