Question: What is the solution?

Solve 2100 - 254 = -279*z - 637 - 865 for z.

Answer: -12

Question: What is the solution?

Solve 12 = -8*z - 4 for z.

Answer: -2

Question: What is the solution?

Solve -1941*t = -3679 + 3699 - 40781 for t.

Answer: 21

Question: What is the solution?

Solve 199 = 2*j + 221 for j.

Answer:
-11