question: Teacher asked me this: Solve 718*d - 358*d = 338*d + 198 for d.
++++++++++
answer: 9

question: Teacher asked me this: Solve 3 = 6*w - 7*w for w.
++++++++++
answer: -3

question: Teacher asked me this: Solve -3764*d + 3556*d = -7904 for d.
++++++++++
answer: 38

question: Teacher asked me this: Solve 0 = -x + 4*x + 15 for x.
++++++++++
answer:
-5