Решите уравнение: 1) 0,75 − х = 0,125; 2) (х − 8) ∙ 4 = 64; 3) 10 + 11 = 101; 4) 15 − − 4 = 5.

Question

Математика: Решите уравнение: 1) 0,75 − х = 0,125; 2) (х − 8) ∙ 4 = 64; 3) 10 + 11 = 101; 4) 15 − − 4 = 5.

polly132 · Accepted Answer

2 -1 3 1 | | 1 0 3 4 | | 1 0 3    4 |
1 0 3 4 | = - | 2 -1   3 1 | = - | 0 -1 -3   -7 | =
1 -1 0 2 | |1 -1 0 2 | | 0 1    3 2 |
3 2 1 1 | |3 2 1 1 | | 0 2 -8 -11 |

| 1 0    3    4 | | 1 0 3 4 |
=   | 0    1    3    7 | = | 0 1 3 7 | =1 * 1 * 14 * (-5)= -70
| 0   0 0 -5 | | 0 0 14 25 |
| 0 0 -14 -25 | | 0 0 0 -5 |

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