| - | 49 50  | + | ( | 553 100  | × | 1 10  | ) | ÷ | ( | 1 10  | + | X | ) | = | 7 20  | − | 37 100  | X | 
| Multiply both sides of the equation by: | ( | 1 10  | + | X | ) | 
| - | 49 50  | ( | 1 10  | + | X | ) | + | ( | 553 100  | × | 1 10  | ) | = | 7 20  | ( | 1 10  | + | X | ) | − | 37 100  | X | ( | 1 10  | + | X | ) | 
| - | 49 50  | × | 1 10  | − | 49 50  | X | + | ( | 553 100  | × | 1 10  | ) | = | 7 20  | ( | 1 10  | + | X | ) | − | 37 100  | X | ( | 1 10  | + | X | ) | 
| - | 49 50  | × | 1 10  | − | 49 50  | X | + | ( | 553 100  | × | 1 10  | ) | = | 7 20  | × | 1 10  | + | 7 20  | X | − | 37 100  | X | ( | 1 10  | + | X | ) | 
| - | 49 500  | − | 49 50  | X | + | ( | 553 100  | × | 1 10  | ) | = | 7 200  | + | 7 20  | X | − | 37 100  | X | ( | 1 10  | + | X | ) | 
| - | 49 500  | − | 49 50  | X | + | 553 100  | × | 1 10  | = | 7 200  | + | 7 20  | X | − | 37 100  | X | ( | 1 10  | + | X | ) | 
| - | 49 500  | − | 49 50  | X | + | 553 100  | × | 1 10  | = | 7 200  | + | 7 20  | X | − | 37 100  | X | × | 1 10  | − | 37 100  | X | X | 
| - | 49 500  | − | 49 50  | X | + | 553 1000  | = | 7 200  | + | 7 20  | X | − | 37 1000  | X | − | 37 100  | X | X | 
91 200  | − | 49 50  | X | = | 7 200  | + | 313 1000  | X | − | 37 100  | X | X |