question: Teacher asked me this: Solve -2*z + 10*z = 40 for z.
++++++++++
answer: 5
Solve 4*k + 3 - 7 = 0 for k.
Solve this plz.

A: 1
QUESTION: Math problem: Solve -30 + 28 = -x for x.
ANS: 2
Q: What is the solution?
Solve -2*s + 20*s + 90 = 0 for s.

A: -5
Write down the solution for this math problem: Solve -13*z + 41*z + 448 = -4*z for z.
answer: -14
Write down the solution for this math problem: Solve -2444 = -9*r + 110*r - 7*r for r.
answer:
-26