Question: What is the solution?

Solve 20*z - 1440 = -335 - 485 for z.

Answer: 31

Question: What is the solution?

Solve -1877*d - 66569 + 14013 = 0 for d.

Answer: -28

Question: What is the solution?

Solve -3078*y + 1038*y = -1044*y - 1061*y - 1430 for y.

Answer: -22

Question: What is the solution?

Solve 77 = -6*s + 63 + 62 for s.

Answer:
8