question: Teacher asked me this: Solve 6*x = -9*x + 30 for x.
++++++++++
answer: 2

question: Teacher asked me this: Solve 67*d - 3822 = -115*d for d.
++++++++++
answer: 21

question: Teacher asked me this: Solve 2753 + 2417 = -235*b for b.
++++++++++
answer: -22

question: Teacher asked me this: Solve -171*y + 0*y - 7665 = 48*y for y.
++++++++++
answer:
-35