Q: Solve 0 = 423*c - 74372 + 69296 for c.

A: 12

Q: Solve -1312*u = -1305*u - 14 for u.

A: 2

Q: Solve 0 = -31*o + 78 + 77 for o.

A: 5

Q: Solve 6436*j + 6741 = 6807*j - 4389 for j.

A:
30