Q: Solve:
Solve 0 = -3*a + 11*a + 16 for a.

A: -2

Q: Solve:
Solve -210*u - 4383 = 540 - 513 for u.

A: -21

Q: Solve:
Solve -1350 = 18*d + 117*d for d.

A:
-10