Solve 6966*c + 4978 + 475 = 6187*c for c.
Solve this plz.

A: -7

Solve -41*r = -65*r - 156*r + 10980 for r.
Solve this plz.

A: 61

Solve 75*w + 83*w + 937 - 147 = 0 for w.
Solve this plz.

A:
-5