| - | 312 25 | + | ( | 1043 50 | × | 13 20 | ) | ÷ | ( | 13 20 | + | X | ) | = | 9 10 | − | 97 100 | X |
| Multiply both sides of the equation by: | ( | 13 20 | + | X | ) |
| - | 312 25 | ( | 13 20 | + | X | ) | + | ( | 1043 50 | × | 13 20 | ) | = | 9 10 | ( | 13 20 | + | X | ) | − | 97 100 | X | ( | 13 20 | + | X | ) |
| - | 312 25 | × | 13 20 | − | 312 25 | X | + | ( | 1043 50 | × | 13 20 | ) | = | 9 10 | ( | 13 20 | + | X | ) | − | 97 100 | X | ( | 13 20 | + | X | ) |
| - | 312 25 | × | 13 20 | − | 312 25 | X | + | ( | 1043 50 | × | 13 20 | ) | = | 9 10 | × | 13 20 | + | 9 10 | X | − | 97 100 | X | ( | 13 20 | + | X | ) |
| - | 1014 125 | − | 312 25 | X | + | ( | 1043 50 | × | 13 20 | ) | = | 117 200 | + | 9 10 | X | − | 97 100 | X | ( | 13 20 | + | X | ) |
| - | 1014 125 | − | 312 25 | X | + | 1043 50 | × | 13 20 | = | 117 200 | + | 9 10 | X | − | 97 100 | X | ( | 13 20 | + | X | ) |
| - | 1014 125 | − | 312 25 | X | + | 1043 50 | × | 13 20 | = | 117 200 | + | 9 10 | X | − | 97 100 | X | × | 13 20 | − | 97 100 | X | X |
| - | 1014 125 | − | 312 25 | X | + | 13559 1000 | = | 117 200 | + | 9 10 | X | − | 1261 2000 | X | − | 97 100 | X | X |
5447 1000 | − | 312 25 | X | = | 117 200 | + | 539 2000 | X | − | 97 100 | X | X |