question: Teacher asked me this: Solve 0 = 48*u + 21*u + 698 + 61 for u.
++++++++++
answer: -11

question: Teacher asked me this: Solve 331*s - 8 = 330*s - 2 for s.
++++++++++
answer: 6

question: Teacher asked me this: Solve -19 = 322*u - 341*u for u.
++++++++++
answer: 1

question: Teacher asked me this: Solve -2811*r + 2843 - 27922 = 5842 for r.
++++++++++
answer:
-11