Q: Solve:
Solve -492*a + 458*a - 238 = 0 for a.

A: -7

Q: Solve:
Solve 762*i = -252*i + 90*i - 4734*i for i.

A: 0

Q: Solve:
Solve 692*r = 694*r - 2 for r.

A:
1