Question

1) 4/7(x-1)=2/7+x
2)4( целых) 5/9-1/6x=5(1+0,1x)​

Answer 1

Ответ:

Пошаговое объяснение:

$\bf 4/7(x-1)=2/7+x\\ 4/7x-4/7=2/7+x\\ 4x-4=2+7x\\ 4x-7x=2+4\\ -3x=6\\ x=-2$

$\bf 4\frac{5}{9}-1/6x=5(1+0,1x)\\ 41/9-1/6x=5+0,5x\\ 41/9-1/6x=5+1/2x\\ 82-3x=90+9x\\ -3x-9x=90-82\\ -12x=8\\ x=-2/3$

Answer 2

Ответ:

Пошаговое объяснение:

4/7(х - 1) = 2/7 + х

4/7х - 4/7 = 2/7 + х

4/7х - х = 2/7 + 4/7

-3/7х = 6/7

х = 6/7 : (-3/7)

х = 6/7 * (-7/3)

х = -6/3

х = -2

4. 5/9 - 1/6х = 5(1 + 0,1х)

4. 5/9 - 1/6х = 5 + 0,5x

-1/6х - 0,5x = 5 - 4. 5/9

-1/6x - 1/2x = 4. 9/9 - 4. 5/9

-1/6x - 3/6x = 4/9

-4/6x = 4/9

x = 4/9 : (-4/6)

x = 4/9 * (-6/4)

x = -6/9

x = -2/3