question: Teacher asked me this: Solve -16 = -10*a + 6*a for a.
++++++++++
answer: 4
Solve -21*r = 90 - 6 for r.
Solve this plz.

A: -4
QUESTION: Math problem: Solve -2*k = -0*k - 4 for k.
ANS: 2
Q: What is the solution?
Solve 578*r + 59 = 637 for r.

A: 1
Write down the solution for this math problem: Solve -677*w + 1064*w + 27090 = 0 for w.
answer: -70
question: Teacher asked me this: Solve -439*c - 61732 = 164*c + 409*c for c.
++++++++++
answer:
-61