question: Teacher asked me this: Solve 21409*n = 21076*n - 9990 for n.
++++++++++
answer: -30

question: Teacher asked me this: Solve 9420*c = -227516 - 469564 for c.
++++++++++
answer: -74

question: Teacher asked me this: Solve 281*j + 50912 = 483*j + 1174*j for j.
++++++++++
answer: 37

question: Teacher asked me this: Solve -100*r - 55*r = -295*r + 3039 + 1301 for r.
++++++++++
answer:
31