Solve 14*r + 13 - 4 = -47 + 14 for r.
Solve this plz.

A: -3

Solve -13 + 70 = -14*i - 13 for i.
Solve this plz.

A: -5

Solve -1535*o + 351 = 1533*o - 3029*o for o.
Solve this plz.

A:
9