| X | ÷ | 135 | − | 80 | ÷ | 130 | − | 420 | ÷ | 1000 | = | 833333 1000000000 | ( | 800 | + | X | ) |
| Left side of the equation = | X | × | 1 135 | − | 8 13 | − | 21 50 |
| = | 1 135 | X | − | 673 650 |
1 135 | X | − | 673 650 | = | 833333 1000000000 | ( | 800 | + | X | ) |
| Right side of the equation = | 833333 1000000000 | × | 800 | + | 833333 1000000000 | X |
| = | 833333 1250000 | + | 833333 1000000000 | X |
1 135 | X | − | 673 650 | = | 833333 1250000 | + | 833333 1000000000 | X |
1 135 | X | − | 833333 1000000000 | X | = | 833333 1250000 | + | 673 650 |