Solve 19966*z - 210 = 19951*z for z.
Solve this plz.

A: 14

Solve 0 = 1028653*q - 1028459*q - 13968 for q.
Solve this plz.

A: 72

Solve -9 = 11*r - 20 for r.
Solve this plz.

A:
1