QUESTION: Math problem: Solve -l - 7 = -13 for l.
ANS: 6
QUESTION: Math problem: Solve -11*r + 2*r - 27 = 0 for r.
ANS: -3
QUESTION: Math problem: Solve -32*a - 3*a = -23*a - 144 for a.
ANS: 12
QUESTION: Math problem: Solve -11641*d = -11671*d + 510 for d.
ANS:
17