question: Teacher asked me this: Solve -43*k - 12 = -47*k for k.
++++++++++
answer: 3

question: Teacher asked me this: Solve -234 = 190*x - 216*x for x.
++++++++++
answer: 9

question: Teacher asked me this: Solve -139*x = -59*x + 91*x - 684 for x.
++++++++++
answer: 4

question: Teacher asked me this: Solve 56*u - 257135 = -257079 for u.
++++++++++
answer:
1