Question: What is the solution?

Solve 675 = 5*v + 715 for v.

Answer: -8

Question: What is the solution?

Solve -6*z + 20*z = 0 for z.

Answer: 0

Question: What is the solution?

Solve 383*u - 20 = 393*u for u.

Answer: -2

Question: What is the solution?

Solve -281*s + 1136 = -352*s for s.

Answer:
-16