Question: What is the solution?

Solve -217 = -4*p - 225 for p.

Answer: -2

Question: What is the solution?

Solve -90 + 870 = 130*y for y.

Answer: 6

Question: What is the solution?

Solve 0 = -8524*u - 396895 - 389371 + 300398 for u.

Answer: -57

Question: What is the solution?

Solve 5473*b + 447*b + 233541 + 19881 = 1474*b for b.

Answer:
-57