Решите уравнения: -6(1-x)+4x=-4 -8(3+x)+x=4 -6=-9(7+x)+4x - вопрос №6144834697484784727943768557 от sinelena2018 16.04.2021 13:43

Question

Математика: Решите уравнения: -6(1-x)+4x=-4 -8(3+x)+x=4 -6=-9(7+x)+4x -8x+4(7+8x)=4x+7 -x+2(7-9x)=x-4

sinelena2018 · Answer

- 6 * ( 1 - X ) + 4X = - 4
- 6 + 6X + 4X = - 4
10X = - 4 + 6
10X = 2
X = 0,2

- 8 * ( 3 + X ) + X = 4
- 24 - 8X + X = 4
- 7X = 4 + 24
- 7X = 28
X = - 4

- 6 = - 9 * ( 7 + X ) + 4X
- 6 = - 63 - 9X + 4X
63 - 6 = - 5X
- 5X = 57
X = - 11,4

- 8X + 4 * ( 7 + 8X ) = 4X + 7
- 8X + 28 + 32X = 4X + 7
24X - 4X = 7 - 28
20X = - 21
X = - 1,05

- X + 2 * ( 7 - 9X ) = X - 4
- X +14 - 18X = X - 4
- 19X - X = - 4 - 14
- 20X = - 28
X = 1,4