Q: What is the solution?
Solve -235*a - 708 + 1357 + 1721 = -77*a for a.

A: 15

Q: What is the solution?
Solve 27 = 4*s - 9 for s.

A: 9

Q: What is the solution?
Solve 456 = 592*l - 568*l for l.

A:
19