| 100000 | + | 3 5 | x | × | 3 | = | 190000 | + | 1 4 | x | × | 3 |
| Left side of the equation = | 100000 | + | 9 5 | x |
| 100000 | + | 9 5 | x | = | 190000 | + | 1 4 | x | × | 3 |
| Right side of the equation = | 190000 | + | 3 4 | x |
| 100000 | + | 9 5 | x | = | 190000 | + | 3 4 | x |
9 5 | x | − | 3 4 | x | = | 190000 | − | 100000 |
21 20 | x | = | 190000 | − | 100000 |
21 20 | x | = | 90000 |
| x | = | 90000 | ÷ | 21 20 |
| = | 90000 | × | 20 21 |
| = | 30000 | × | 20 7 |
| x | = | 600000 7 |
| x | = | 85714.285714 |