Question: What is the solution?

Solve -58*a + 256 + 15 = -309 for a.

Answer: 10

Question: What is the solution?

Solve 37*z + 31*z + 544 = 0 for z.

Answer: -8

Question: What is the solution?

Solve -6 = 2*f - 0 for f.

Answer: -3

Question: What is the solution?

Solve 236*w = 99*w + 56*w - 45*w - 4158 for w.

Answer:
-33