Solve 4647 = -846*r - 22*r + 1175 for r.
Solve this plz.

A: -4

Solve 2320*a = -855*a + 95250 for a.
Solve this plz.

A: 30

Solve -46*u + 13 = -59*u for u.
Solve this plz.

A:
-1