Solve 122 - 707 = -65*o for o.
Solve this plz.

A: 9

Solve -4958*t = 5870*t + 487260 for t.
Solve this plz.

A: -45

Solve -2121 - 3059 - 4014 + 3029 = 137*r for r.
Solve this plz.

A:
-45