Варіант 2. Номер 188
Розв’яжіть рівняння:
| 1) x – | 9 | = | 5 | ; |
| 23 | 23 |
| x = | 5 | + | 9 | ; |
| 23 | 23 |
| x = | 14 | . |
| 23 |
| 2) ( | 6 | – x) + | 8 | = | 12 | ; |
| 35 | 35 | 35 |
| 6 | – x = | 12 | – | 8 | ; |
| 35 | 35 | 35 |
| 6 | – x = | 4 | ; |
| 35 | 35 |
| x = | 6 | – | 4 | ; |
| 35 | 35 |
| x = | 2 | ; |
| 35 |
| 3) | 27 | – | x | = | 9 | ; |
| 41 | 41 | 41 |
| x | = | 27 | – | 9 | ; |
| 41 | 41 | 41 |
| x | = | 18 | ; |
| 41 | 41 |
x = 18.