question: Teacher asked me this: Solve -71190 = 2411*j - 7157*j for j.
++++++++++
answer: 15

question: Teacher asked me this: Solve -336*z - 853*z = 3686*z for z.
++++++++++
answer: 0

question: Teacher asked me this: Solve 11*a + 13*a + 135 = 9*a for a.
++++++++++
answer: -9

question: Teacher asked me this: Solve 3*o + 0 = 15 for o.
++++++++++
answer:
5