Solve -2*a + 2 = -2 for a.
Solve this plz.

A: 2

Solve 4823*w = 4716*w + 321 for w.
Solve this plz.

A: 3

Solve 8*c = 71*c - 298789 + 297466 for c.
Solve this plz.

A:
21