| ( | 40987098941 100 | − | 10246762337 25 | ) | ÷ | ( | 10246762337 25 | − | 4094819473 10 | ) | = | ( | r | + | 107 64 | ) | ÷ | ( | - | 107 64 | + | 329489 250000 | ) |
| 方程两边同时乘以: | ( | 10246762337 25 | − | 4094819473 10 | ) | , | ( | - | 107 64 | + | 329489 250000 | ) |
| ( | 40987098941 100 | − | 10246762337 25 | ) | ( | - | 107 64 | + | 329489 250000 | ) | = | ( | r | + | 107 64 | ) | ( | 10246762337 25 | − | 4094819473 10 | ) |
40987098941 100 | ( | - | 107 64 | + | 329489 250000 | ) | − | 10246762337 25 | ( | - | 107 64 | + | 329489 250000 | ) | = | ( | r | + | 107 64 | ) | ( | 10246762337 25 | − | 4094819473 10 | ) |
40987098941 100 | ( | - | 107 64 | + | 329489 250000 | ) | − | 10246762337 25 | ( | - | 107 64 | + | 329489 250000 | ) | = | r | ( | 10246762337 25 | − | 4094819473 10 | ) | + | 107 64 | ( | 10246762337 25 | − | 4094819473 10 | ) |
| - | 40987098941 100 | × | 107 64 | + | 40987098941 100 | × | 329489 250000 | − | 10246762337 25 | ( | - | 107 64 | + | 329489 250000 | ) | = | r | ( | 10246762337 25 | − | 4094819473 10 | ) | + | 107 64 | ( | 10246762337 25 | − | 4094819473 10 | ) |
| - | 40987098941 100 | × | 107 64 | + | 40987098941 100 | × | 329489 250000 | − | 10246762337 25 | ( | - | 107 64 | + | 329489 250000 | ) | = | r | × | 10246762337 25 | − | r | × | 4094819473 10 | + | 107 64 | ( | 10246762337 25 | − | 4094819473 10 | ) |