Q: Solve:
Solve -7*a - 43 = -50 for a.

A: 1

Q: Solve:
Solve -26*z = -283 + 924 + 243 for z.

A: -34

Q: Solve:
Solve 55104 = -1077*r - 456*r - 27368 + 16553 for r.

A:
-43