question: Teacher asked me this: Solve 29*w = 25*w + 16 for w.
++++++++++
answer: 4

question: Teacher asked me this: Solve 13*j - 27*j - 11*j = 0 for j.
++++++++++
answer: 0

question: Teacher asked me this: Solve -a + 19 = 18 for a.
++++++++++
answer: 1

question: Teacher asked me this: Solve 391*h - 451*h = -120 for h.
++++++++++
answer:
2