3 4 | x | + | 105 | × | 1 4 | = | 200 |
| 方程左边 = | 3 4 | x | + | 105 4 |
3 4 | x | + | 105 4 | = | 200 |
3 4 | x | = | 200 | − | 105 4 |
3 4 | x | = | 695 4 |
| x | = | 695 4 | ÷ | 3 4 |
| = | 695 4 | × | 4 3 |
| = | 695 | × | 1 3 |
| x | = | 695 3 |
| x | = | 231.666667 |
3 4 | x | + | 121 | × | 1 4 | = | 220 |
| 方程左边 = | 3 4 | x | + | 121 4 |
3 4 | x | + | 121 4 | = | 220 |
3 4 | x | = | 220 | − | 121 4 |
3 4 | x | = | 759 4 |
| x | = | 759 4 | ÷ | 3 4 |
| = | 759 4 | × | 4 3 |
| = | 253 | × | 1 |
| x | = | 253 |
3 4 | x | + | 255 | × | 1 4 | = | 225 |
| 方程左边 = | 3 4 | x | + | 255 4 |
3 4 | x | + | 255 4 | = | 225 |
3 4 | x | = | 225 | − | 255 4 |
3 4 | x | = | 645 4 |
| x | = | 645 4 | ÷ | 3 4 |
| = | 645 4 | × | 4 3 |
| = | 215 | × | 1 |
| x | = | 215 |