question: Teacher asked me this: Solve 0 = a - 21 + 20 for a.
++++++++++
answer: 1
Solve -225*c + 170*c - 1015 = 342 + 403 for c.
Solve this plz.

A: -32
QUESTION: Math problem: Solve 12560*s = 13677*s - 42446 for s.
ANS: 38
Q: What is the solution?
Solve 78056 = 5863860*q - 5864747*q for q.

A: -88
Write down the solution for this math problem: Solve -48 = 151*b - 145*b for b.
answer: -8
QUESTION: Math problem: Solve -549*k - 56875 = -18 + 5729 for k.
ANS:
-114