question: Teacher asked me this: Solve 3068 = -15*r + 3068 for r.
++++++++++
answer: 0

question: Teacher asked me this: Solve 37 + 53 = -45*l for l.
++++++++++
answer: -2

question: Teacher asked me this: Solve -33*z - 12 = 34*z - 69*z for z.
++++++++++
answer: 6

question: Teacher asked me this: Solve 13 = j + 9 for j.
++++++++++
answer:
4