Question: What is the solution?

Solve 256 - 155 = 46*s + 55*s for s.

Answer: 1

Question: What is the solution?

Solve 72 = 4*d + 92 for d.

Answer: -5

Question: What is the solution?

Solve -257820 + 257975 = -31*p for p.

Answer: -5

Question: What is the solution?

Solve 0 = 24*a - 49*a + 43*a - 90 for a.

Answer:
5