question: Teacher asked me this: Solve -7*u - 4*u + 33 = 0 for u.
++++++++++
answer: 3

question: Teacher asked me this: Solve 100*a - 29*a - 85 = -1505 for a.
++++++++++
answer: -20

question: Teacher asked me this: Solve -9*i + 96*i + 1044 = 0 for i.
++++++++++
answer: -12

question: Teacher asked me this: Solve -29*o + 300 = -65*o + 6*o for o.
++++++++++
answer:
-10