15 | ÷ | 6679 50 | + | 3 | ÷ | 447 10 | + | X | ÷ | 1000 | + | ( | 372 5 | − | X | ) | ÷ | 1650 | = | 9 40 |
方程左边 = | 750 6679 | + | 10 149 | + | X | × | 1 1000 | + | ( | 372 5 | − | X | ) | × | 1 1650 |
= | 178540 995171 | + | 1 1000 | X | + | ( | 372 5 | − | X | ) | × | 1 1650 |
178540 995171 | + | 1 1000 | X | + | ( | 372 5 | − | X | ) | × | 1 1650 | = | 9 40 |
方程左边 = | 178540 995171 | + | 1 1000 | X | + | 372 5 | × | 1 1650 | − | X | × | 1 1650 |
= | 178540 995171 | + | 1 1000 | X | + | 62 1375 | − | X | × | 1 1650 |
= | 307193102 1368360125 | + | 13 33000 | X |
307193102 1368360125 | + | 13 33000 | X | = | 9 40 |
13 33000 | X | = | 9 40 | − | 307193102 1368360125 |
X= | √228009 √140000 |