Question: What is the solution?

Solve 548*u - 4878 + 9821 = -8209 for u.

Answer: -24

Question: What is the solution?

Solve 3839 + 140 = -575*p + 18929 for p.

Answer: 26

Question: What is the solution?

Solve -25*d + 33 = 20*d - 34*d for d.

Answer: 3

Question: What is the solution?

Solve 355*b - 959*b = 12080 for b.

Answer:
-20