Q: What is the solution?
Solve 23 = 21778*f - 10914*f - 10887*f for f.

A: -1

Q: What is the solution?
Solve 0*a + 0*a = 6*a for a.

A: 0

Q: What is the solution?
Solve 674*d - 714*d - 320 = 0 for d.

A:
-8