| 70 | x | ( | 69 20 | + | 17 10 | ) | + | 22 | x | ( | 27 10 | + | 7 5 | ) | + | 5 | x | ( | 13 5 | + | 4 5 | ) | = | 0 |
| Left side of the equation = | 70 | x | × | 69 20 | + | 70 | x | × | 17 10 | + | 22 | x | ( | 27 10 | + | 7 5 | ) | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 483 2 | x | + | 119 | x | + | 22 | x | ( | 27 10 | + | 7 5 | ) | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 721 2 | x | + | 22 | x | ( | 27 10 | + | 7 5 | ) | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 721 2 | x | + | 22 | x | × | 27 10 | + | 22 | x | × | 7 5 | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 721 2 | x | + | 297 5 | x | + | 154 5 | x | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 4507 10 | x | + | 5 | x | ( | 13 5 | + | 4 5 | ) |
| = | 4507 10 | x | + | 5 | x | × | 13 5 | + | 5 | x | × | 4 5 |
| = | 4507 10 | x | + | 13 | x | + | 4 | x |
| = | 4677 10 | x |
4677 10 | x | = | 0 |
| x | = | 0 | ÷ | 4677 10 |
| = | 0 | × | 10 4677 |
| x | = | 0 |