( | X | − | 6970 | ) | ÷ | ( | 760 | − | 6970 | ) | = | ( | 500 | − | 480 | ) | ÷ | ( | 540 | − | 480 | ) |
方程两边同时乘以: | ( | 760 | − | 6970 | ) | , | ( | 540 | − | 480 | ) |
( | X | − | 6970 | ) | ( | 540 | − | 480 | ) | = | ( | 500 | − | 480 | ) | ( | 760 | − | 6970 | ) |
X | ( | 540 | − | 480 | ) | − | 6970 | ( | 540 | − | 480 | ) | = | ( | 500 | − | 480 | ) | ( | 760 | − | 6970 | ) |
X | ( | 540 | − | 480 | ) | − | 6970 | ( | 540 | − | 480 | ) | = | 500 | ( | 760 | − | 6970 | ) | − | 480 | ( | 760 | − | 6970 | ) |
X | × | 540 | − | X | × | 480 | − | 6970 | ( | 540 | − | 480 | ) | = | 500 | ( | 760 | − | 6970 | ) | − | 480 | ( | 760 | − | 6970 | ) |
X | × | 540 | − | X | × | 480 | − | 6970 | ( | 540 | − | 480 | ) | = | 500 | × | 760 | − | 500 | × | 6970 | − | 480 | ( | 760 | − | 6970 | ) |
X | × | 540 | − | X | × | 480 | − | 6970 | ( | 540 | − | 480 | ) | = | 380000 | − | 3485000 | − | 480 | ( | 760 | − | 6970 | ) |
60 | X | − | 6970 | ( | 540 | − | 480 | ) | = | - | 3105000 | − | 480 | ( | 760 | − | 6970 | ) |
60 | X | − | 6970 | × | 540 | + | 6970 | × | 480 | = | - | 3105000 | − | 480 | ( | 760 | − | 6970 | ) |
60 | X | − | 6970 | × | 540 | + | 6970 | × | 480 | = | - | 3105000 | − | 480 | × | 760 | + | 480 | × | 6970 |
60 | X | − | 3763800 | + | 3345600 | = | - | 3105000 | − | 364800 | + | 3345600 |
60 | X | − | 418200 | = | - | 124200 |
60 | X | = | - | 124200 | + | 418200 |
60 | X | = | 294000 |
X | = | 294000 | ÷ | 60 |
= | 294000 | × | 1 60 |
= | 4900 | × | 1 |
X | = | 4900 |