Q: What is the solution?
Solve -10*l = -7*l - 9 for l.

A: 3

Q: What is the solution?
Solve 270 = 25*x + 72 + 98 for x.

A: 4

Q: What is the solution?
Solve 1417*b - 98*b = -21104 for b.

A:
-16