Question: What is the solution?

Solve 0 = 28*z + 363 - 139 for z.

Answer: -8

Question: What is the solution?

Solve -592*q + 8665 + 38695 = 0 for q.

Answer: 80

Question: What is the solution?

Solve 21*d - 11 - 241 = 0 for d.

Answer: 12

Question: What is the solution?

Solve -16*a - 871 + 167 = 31*a + 1223 for a.

Answer:
-41