( | 10080 | - | 10080 | x | - | 1120 | - | 2240 | + | 2800 | ) | ( | 1 | - | x | ) | = | 4200 |
方程左边 = | 10080 | ( | 1 | - | x | ) | - | 10080 | x | ( | 1 | - | x | ) | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | × | 1 | - | 10080 | x | - | 10080 | x | ( | 1 | - | x | ) | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 10080 | x | - | 10080 | x | ( | 1 | - | x | ) | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 10080 | x | - | 10080 | x | × | 1 | + | 10080 | x | x | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 10080 | x | - | 10080 | x | + | 10080 | x | x | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 20160 | x | + | 10080 | x | x | - | 1120 | ( | 1 | - | x | ) | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 20160 | x | + | 10080 | x | x | - | 1120 | × | 1 | + | 1120 | x | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 10080 | - | 20160 | x | + | 10080 | x | x | - | 1120 | + | 1120 | x | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 8960 | - | 19040 | x | + | 10080 | x | x | - | 2240 | ( | 1 | - | x | ) | + | 2800 | ( | 1 | - | x | ) |
= | 8960 | - | 19040 | x | + | 10080 | x | x | - | 2240 | × | 1 | + | 2240 | x | + | 2800 | ( | 1 | - | x | ) |
= | 8960 | - | 19040 | x | + | 10080 | x | x | - | 2240 | + | 2240 | x | + | 2800 | ( | 1 | - | x | ) |
= | 6720 | - | 16800 | x | + | 10080 | x | x | + | 2800 | ( | 1 | - | x | ) |
= | 6720 | - | 16800 | x | + | 10080 | x | x | + | 2800 | × | 1 | - | 2800 | x |
= | 6720 | - | 16800 | x | + | 10080 | x | x | + | 2800 | - | 2800 | x |
= | 9520 | - | 19600 | x | + | 10080 | x | x |
9520 | - | 19600 | x | + | 10080 | x | x | = | 4200 |