Q: Solve:
Solve 292*a - 5919*a - 536865 - 347475 = 4199*a for a.

A: -90

Q: Solve:
Solve 1602997*r = 1602914*r - 166 for r.

A: -2

Q: Solve:
Solve 31 - 34 = -i for i.

A:
3