| ( | 8450 | + | 100 | + | X | ) | ( | 536297 10000000 | + | 7 500 | ) | × | 1 | ÷ | 4 | = | X |
| 方程左边 = | ( | 8450 | + | 100 | + | X | ) | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| ( | 8450 | + | 100 | + | X | ) | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 | = | X |
| 方程左边 = | 8450 | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 | + | 100 | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 4225 2 | ( | 536297 10000000 | + | 7 500 | ) | + | 25 | ( | 536297 10000000 | + | 7 500 | ) | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 4225 2 | × | 536297 10000000 | + | 4225 2 | × | 7 500 | + | 25 | ( | 536297 10000000 | + | 7 500 | ) | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 90634193 800000 | + | 1183 40 | + | 25 | ( | 536297 10000000 | + | 7 500 | ) | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 114294193 800000 | + | 25 | ( | 536297 10000000 | + | 7 500 | ) | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 114294193 800000 | + | 25 | × | 536297 10000000 | + | 25 | × | 7 500 | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |
| = | 114294193 800000 | + | 536297 400000 | + | 7 20 | + | X | ( | 536297 10000000 | + | 7 500 | ) | × | 1 4 |