question: Teacher asked me this: Solve 54 = 9*x + 27 for x.
++++++++++
answer: 3

question: Teacher asked me this: Solve 4*j + 79 = 99 for j.
++++++++++
answer: 5

question: Teacher asked me this: Solve 5 + 17 = 11*b for b.
++++++++++
answer: 2

question: Teacher asked me this: Solve -28 = -391*y + 398*y for y.
++++++++++
answer:
-4