question: Teacher asked me this: Solve -70*w + 2780 = 7*w + 62*w for w.
++++++++++
answer: 20

question: Teacher asked me this: Solve k + k = 0 for k.
++++++++++
answer: 0

question: Teacher asked me this: Solve 126*k + 3678 - 775 = 5 for k.
++++++++++
answer: -23

question: Teacher asked me this: Solve -72*w - 9189 + 7109 = 32*w for w.
++++++++++
answer:
-20