15 | ÷ | 6679 50 | + | 3 | ÷ | 447 10 | + | X | ÷ | 1000 | + | ( | 743 10 | − | X | ) | ÷ | 1650 | = | 9 40 |
方程左边 = | 750 6679 | + | 10 149 | + | X | × | 1 1000 | + | ( | 743 10 | − | X | ) | × | 1 1650 |
= | 178540 995171 | + | 1 1000 | X | + | ( | 743 10 | − | X | ) | × | 1 1650 |
178540 995171 | + | 1 1000 | X | + | ( | 743 10 | − | X | ) | × | 1 1650 | = | 9 40 |
方程左边 = | 178540 995171 | + | 1 1000 | X | + | 743 10 | × | 1 1650 | − | X | × | 1 1650 |
= | 178540 995171 | + | 1 1000 | X | + | 743 16500 | − | X | × | 1 1650 |