Q: Solve:
Solve -4*a = -5*a - 4 for a.

A: -4

Q: Solve:
Solve -2416*x - 154 + 1608 = 211 - 1173 for x.

A: 1

Q: Solve:
Solve -15 = 10*d + 5 for d.

A:
-2