Problem: Math Problem
Solve -12000 = -3957*z - 4108*z + 7915*z for z.

A: 80

Problem: Math Problem
Solve -80*o = 96*o + 43*o - 2660 - 6538 for o.

A: 42

Problem: Math Problem
Solve 10 - 9 = x for x.

A:
1