Q: What is the solution?
Solve 363*f + 555 = 325*f - 15 for f.

A: -15

Q: What is the solution?
Solve 6*z - 4*z = 41*z + 390 for z.

A: -10

Q: What is the solution?
Solve 5*l + 11*l - 586 + 250 = 0 for l.

A:
21