Solve -1697 - 903 - 2631 = 117*b + 736 for b.
Solve this plz.

A: -51

Solve -1045*d + 75*d = 305*d - 186*d + 88209 for d.
Solve this plz.

A: -81

Solve 7*r - 20*r = -13 for r.
Solve this plz.

A:
1