Q: Solve:
Solve -438*r - 2531 = -1891 + 5054 for r.

A: -13

Q: Solve:
Solve 0 = -153*j + 94*j + 354 for j.

A: 6

Q: Solve:
Solve 81*v + 24*v = -28 - 77 for v.

A:
-1