question: Teacher asked me this: Solve -23538*z = -23207*z + 13240 for z.
++++++++++
answer: -40
Solve 81*c - 870 = -39*c + 90*c - 28*c for c.
Solve this plz.

A: 15
QUESTION: Math problem: Solve -15 = -5*t - 35 for t.
ANS: -4
Q: What is the solution?
Solve -8*h + 8 + 8 = 0 for h.

A: 2
Write down the solution for this math problem: Solve 0 = 8*a + 29 - 21 for a.
answer: -1
QUESTION: Math problem: Solve 878*s = -887*s + 1744*s - 315 for s.
ANS:
-15