question: Teacher asked me this: Solve -29*i + 31*i + 6 = 0 for i.
++++++++++
answer: -3
Solve 0 = -2200*b + 1090*b + 1087*b + 1840 for b.
Solve this plz.

A: 80
QUESTION: Math problem: Solve 21 = 13*k - 31 for k.
ANS: 4
Q: What is the solution?
Solve -2314 - 9357 - 22414 = -1672*r + 66235 for r.

A: 60
Write down the solution for this math problem: Solve 30 = -2497*c + 2491*c - 24 for c.
answer: -9
QUESTION: Math problem: Solve -1572 = 108*b - 384 for b.
ANS:
-11