99 4 | = | ( | 72 25 | − | 119 50 | + | 19 10 | − | x | ) | ÷ | 4 | × | 1 100 |
方程右边 = | ( | 72 25 | − | 119 50 | + | 19 10 | − | x | ) | × | 1 400 |
99 4 | = | ( | 72 25 | − | 119 50 | + | 19 10 | − | x | ) | × | 1 400 |
方程右边 = | 72 25 | × | 1 400 | − | 119 50 | × | 1 400 | + | 19 10 | × | 1 400 | − | x | × | 1 400 |
= | 9 1250 | − | 119 20000 | + | 19 4000 | − | x | × | 1 400 |
= | 3 500 | − | 1 400 | x |
99 4 | = | 3 500 | − | 1 400 | x |
1 400 | x | = | 3 500 | − | 99 4 |
1 400 | x | = | - | 3093 125 |
x | = | - | 3093 125 | ÷ | 1 400 |
= | - | 3093 125 | × | 400 |
= | - | 3093 5 | × | 16 |
x | = | - | 49488 5 |
x | = | - 9897.6 |