Question: What is the solution?

Solve -4215*b = -4172*b for b.

Answer: 0

Question: What is the solution?

Solve 97*x - 122*x + 200 = 0 for x.

Answer: 8

Question: What is the solution?

Solve -45*y - 924 = -4*y + 3*y for y.

Answer: -21

Question: What is the solution?

Solve -2845*b + 3507*b = 5958 for b.

Answer:
9