question: Teacher asked me this: Solve 21*a - 3*a - 1058 = 64*a for a.
++++++++++
answer: -23

question: Teacher asked me this: Solve 0 = -v + 103*v + 816 for v.
++++++++++
answer: -8

question: Teacher asked me this: Solve 9918*f = 10022*f + 312 for f.
++++++++++
answer: -3

question: Teacher asked me this: Solve 697*j - 2850 + 16550 = -937 for j.
++++++++++
answer:
-21