| ( | 2471 20 | + | 53 2 | a | ) | ÷ | 56 | × | 3 10 | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | ÷ | ( | 115 | + | 4 | + | 53 2 | ) | × | 7 10 | = | 112 25 |
| 方程两边同时乘以: | ( | 115 | + | 4 | + | 53 2 | ) |
| ( | 2471 20 | + | 53 2 | a | ) | ÷ | 56 | × | 3 10 | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 112 25 | ( | 115 | + | 4 | + | 53 2 | ) |
2471 20 | ÷ | 56 | × | 3 10 | ( | 115 | + | 4 | + | 53 2 | ) | + | 53 2 | a | ÷ | 56 | × | 3 10 | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 112 25 | ( | 115 | + | 4 | + | 53 2 | ) |
2471 20 | ÷ | 56 | × | 3 10 | ( | 115 | + | 4 | + | 53 2 | ) | + | 53 2 | a | ÷ | 56 | × | 3 10 | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 112 25 | × | 115 | + | 112 25 | × | 4 | + | 112 25 | × | 53 2 |
1059 1600 | ( | 115 | + | 4 | + | 53 2 | ) | + | 159 1120 | a | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 2576 5 | + | 448 25 | + | 2968 25 |
1059 1600 | ( | 115 | + | 4 | + | 53 2 | ) | + | 159 1120 | a | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
1059 1600 | × | 115 | + | 1059 1600 | × | 4 | + | 1059 1600 | × | 53 2 | + | 159 1120 | a | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
24357 320 | + | 1059 400 | + | 56127 3200 | + | 159 1120 | a | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
308169 3200 | + | 159 1120 | a | ( | 115 | + | 4 | + | 53 2 | ) | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
308169 3200 | + | 159 1120 | a | × | 115 | + | 159 1120 | a | × | 4 | + | 159 1120 | a | × | 53 2 | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
308169 3200 | + | 3657 224 | a | + | 159 280 | a | + | 8427 2240 | a | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
308169 3200 | + | 46269 2240 | a | + | ( | 5041 10 | + | 53 2 | a | + | 4 | × | 4 | ) | × | 7 10 | = | 16296 25 |
308169 3200 | + | 46269 2240 | a | + | 5041 10 | × | 7 10 | + | 53 2 | a | × | 7 10 | + | 4 | × | 4 | × | 7 10 | = | 16296 25 |
308169 3200 | + | 46269 2240 | a | + | 35287 100 | + | 371 20 | a | + | 56 5 | = | 16296 25 |
1473193 3200 | + | 87821 2240 | a | = | 16296 25 |
87821 2240 | a | = | 16296 25 | − | 1473193 3200 |
87821 2240 | a | = | 122539 640 |
| a | = | 122539 640 | ÷ | 87821 2240 |
| = | 122539 640 | × | 2240 87821 |
| = | 122539 2 | × | 7 87821 |
| a | = | 857773 175642 |
| a | = | 4.883644 |