question: Teacher asked me this: Solve -57*v + 102 = -40*v for v.
++++++++++
answer: 6

question: Teacher asked me this: Solve -22*l + 344 = -65*l for l.
++++++++++
answer: -8

question: Teacher asked me this: Solve 1539*a + 272983 = 154480 for a.
++++++++++
answer: -77

question: Teacher asked me this: Solve 24*r + 163*r + 570 = -3357 for r.
++++++++++
answer:
-21