Question: What is the solution?

Solve 0 = 358*a - 386*a - 28 for a.

Answer: -1

Question: What is the solution?

Solve 4998*l - 3514*l = -59360 for l.

Answer: -40

Question: What is the solution?

Solve -66737 = -43*n - 33881 - 35264 for n.

Answer: -56

Question: What is the solution?

Solve -15*z - 12*z = 54 for z.

Answer:
-2