Problem: Math Problem
Solve 0 = -9*d - 9 + 54 for d.

A: 5

Problem: Math Problem
Solve -2660347 = -8*z - 10*z - 2659825 for z.

A: 29

Problem: Math Problem
Solve -21*r + 507 = -68*r + 37 for r.

A:
-10