137 1000 | Z | − | 3 | + | 119 1000 | Z | − | 2 | + | 269 1000 | Z | − | 1 | − | 19 1000 | = | 167 1000 |
| Left side of the equation = | 21 40 | Z | − | 6019 1000 |
21 40 | Z | − | 6019 1000 | = | 167 1000 |
21 40 | Z | = | 167 1000 | + | 6019 1000 |
21 40 | Z | = | 3093 500 |
| Z | = | 3093 500 | ÷ | 21 40 |
| = | 3093 500 | × | 40 21 |
| = | 1031 25 | × | 2 7 |
| Z | = | 2062 175 |
| Z | = | 11.782857 |