Question: What is the solution?

Solve 0 = 171*z - 648 - 1746 for z.

Answer: 14

Question: What is the solution?

Solve 0 = -4*d - 22 + 12 - 10 for d.

Answer: -5

Question: What is the solution?

Solve 0 = 9*d + 15*d - 46*d + d - 693 for d.

Answer: -33

Question: What is the solution?

Solve 47*v - 63*v + 80 = 0 for v.

Answer:
5