Question: What is the solution?

Solve 1071*d = 2131*d - 1075*d - 285 for d.

Answer: -19

Question: What is the solution?

Solve -190*g + 206*g - 224 = 0 for g.

Answer: 14

Question: What is the solution?

Solve -18*l - 403 = -2*l - 291 for l.

Answer: -7

Question: What is the solution?

Solve 2530*q - 2591*q - 122 = 0 for q.

Answer:
-2