question: Teacher asked me this: Solve 2699*l = 2715*l - 80 for l.
++++++++++
answer: 5

question: Teacher asked me this: Solve -961*z + 972*z = 165 for z.
++++++++++
answer: 15

question: Teacher asked me this: Solve -2*s - 43*s = -1638 + 423 for s.
++++++++++
answer: 27

question: Teacher asked me this: Solve 0 = 937*u - 124 + 1998 for u.
++++++++++
answer:
-2