Solve 7 = w + 9 for w.
Solve this plz.

A: -2

Solve -2006*b + 665*b - 5884 + 25423 + 62262 = 0 for b.
Solve this plz.

A: 61

Solve 63*k - 4297 - 1345 = -287*k + 9058 for k.
Solve this plz.

A:
42