Question: What is the solution?

Solve 19046*k - 18752*k + 25872 = 0 for k.

Answer: -88

Question: What is the solution?

Solve -2504 - 772 = -78*x for x.

Answer: 42

Question: What is the solution?

Solve 0 = 127*r - 142*r + 46*r + 217 for r.

Answer: -7

Question: What is the solution?

Solve 57*d - 65*d - 8 = 0 for d.

Answer:
-1