Q: Solve 90 = 409*n - 400*n for n.

A: 10
Q: Solve:
Solve 7*r = -8*r for r.

A: 0
Question: What is the solution?

Solve -6 = -5*k - k for k.

Answer: 1
Problem: Math Problem
Solve 246*h + 280 = 316*h for h.

A: 4
Question:
Solve 1232*d = 891*d + 2728 for d..

Answer:
8
Solve 6*x + 92 = 56 for x.
Solve this plz.

A:
-6