Question: What is the solution?

Solve 1967 = -522*a - 2209 for a.

Answer: -8

Question: What is the solution?

Solve 190*j + 12 = 188*j for j.

Answer: -6

Question: What is the solution?

Solve 33*h + 50 = -49 for h.

Answer: -3

Question: What is the solution?

Solve 0 = 60*z - 23*z + 3*z + 720 for z.

Answer:
-18