Question: What is the solution?

Solve -9*z = 31 + 14 for z.

Answer: -5

Question: What is the solution?

Solve 5*u - 23*u - 30*u - 12*u = -2340 for u.

Answer: 39

Question: What is the solution?

Solve 7*f + 241 - 276 = 0 for f.

Answer: 5

Question: What is the solution?

Solve 108*y = 119*y + 55 for y.

Answer:
-5