question: Teacher asked me this: Solve 50*l - 873 = -20*l - 5*l - 2373 for l.
++++++++++
answer: -20

question: Teacher asked me this: Solve 1553 + 2102 = 149*d - 880*d for d.
++++++++++
answer: -5

question: Teacher asked me this: Solve -10*r + 34*r + 36*r = -120 for r.
++++++++++
answer: -2

question: Teacher asked me this: Solve -11*d - 23 + 1 = 0 for d.
++++++++++
answer:
-2