question: Teacher asked me this: Solve 39*r - 38*r + 4 = 0 for r.
++++++++++
answer: -4
Solve -9*k + 5*k = -20 for k.
Solve this plz.

A: 5
QUESTION: Math problem: Solve 21*v + 325060 = 325606 for v.
ANS: 26
Q: What is the solution?
Solve 0 = 7*x + 31 - 10 for x.

A: -3
Write down the solution for this math problem: Solve 1005 = -468*s + 5685 for s.
answer: 10
Q: Solve:
Solve 0 = -9*s + 105 - 6 for s.

A:
11