Q: What is the solution?
Solve 0 = -3*d - 4*d for d.

A: 0

Q: What is the solution?
Solve 3663*x + 17442 + 17911 + 15973 - 7370 = 0 for x.

A: -12

Q: What is the solution?
Solve 1230*b + 63600 = -1228*b + 868*b for b.

A:
-40