X | × | 1 100 | − | ( | 10 | + | ( | X | − | 500 | ) | × | 3 500 | ) | = | 1 |
Left side of the equation = | 1 100 | X | − | 10 | − | ( | X | − | 500 | ) | × | 3 500 |
= | 1 100 | X | − | 10 | − | X | × | 3 500 | + | 500 | × | 3 500 |
= | 1 100 | X | − | 10 | − | X | × | 3 500 | + | 3 |
= | 1 250 | X | − | 7 |
1 250 | X | − | 7 | = | 1 |
1 250 | X | = | 1 | + | 7 |
1 250 | X | = | 8 |
X | = | 8 | ÷ | 1 250 |
= | 8 | × | 250 |
X | = | 2000 |