Solve -6859 = 86*m - 11847 for m.
Solve this plz.

A: 58

Solve -14*k + 1264 + 4046 - 1406 = 47*k for k.
Solve this plz.

A: 64

Solve -1 = -8*z - 9 for z.
Solve this plz.

A:
-1