, надо решить 8 примеров 6 класс​">

Пошаговое объяснение:

1) 0,1x-0,8=0,9 |*10

x=9+8; x=17

2) 7/9x+11/12=13/18 |*36

28x+33=26

28x=--7 |:28 ; x= -0,25

3) 11/9y +3 =-23/7 | * 63

77y + 189 = -207

77y = -396 | : 77

y= - 36/7;

4)-9/14x+2=32/7 |*14

-9x + 28 = 64

9x =28-64

9x = -36

x = -4

5) 5/24x=-55/48 |*48

10x=-55

x=-5,5

6)11/15y+9/10=8/15 |*30

22y+27=16

22y=-11

y=-0,5

Пошаговое объяснение:

1) 0.1 × (x-8) = 0.9

(1) 1/10 × (x-8) = 9/10

(2) 1/10x - 8 = 9/10

(3) x = 17/10 ÷ 1/10

(4) x = 17

2) 7/9x + 11/12 = 13/18

(1) 7x/9 + 11/12 = 13/18

(2) 7x + 33/4 = 13/2

(3) x = - 1/4

3) 1 2/9 y + 3 = -3 2/7 (1 2/9 - это 1 целая и 2/9 или 11/9)

(1) 1 2/9 y = -3 + (-3 2/7)

(2) 1 2/9 y = -6 2/7

(3) y = -1 2/9 + (-6 2/7)

(4) y = -11/9 + -44/7

(5) y = -11×7 / 9×7 + -44×9 / 7 × 9

(6) y = -77/63 + -396/63

(7) y = -473/63

(8) y ≈ - 7.51

4) -9/14x + 2 = 4 4/7

(1) -9/14x = 2 - 4 4/7

(2) -9/14x = -2 4/7

(3) x = 9/14 - 2 4/7

(4) x = 9/14 + 36/14

(5) x = -27/+14

(6) x ≈ -1.93

5) 5/24x = -1 7/48

(1) x = -5/24 + (-1 7/48)

(2) x = -5/24 + -55/+48

(3) x = -5 × 2 / 24 × 2 + -55/48

(4) x = -10/48 + -55/48

(5) x = -65/48

(6) x ≈ - 1.35

6) 11/15y + 9/10 = 8/15

(1) 11/15y = -9/10 + 8/15

(2) 11/15y = -9×3 / 10×3 + 8×2 / 15 × 2

(3) 11/15y = -27/30 + 16/30

(4) 11/15y = -11/30

(5) y = -11/15 + (-11/30)

(6) y = -11×2 / 15/2 + -11/30

(7) y = -22/30 + (-11/30)

(8) y = -33/30

(9) y = -11/10

(10) y = -1.1

7) -0.01x = 1

(1) x = 0.01 + 1

(2) x = 1.01

8) 2 1/3 - (y - 5/12) = 1.75

(1) y = 2 1/3 - 5/12 + (-1.75)

(2) y = 7×4 / 3×4 + 5/12 + (-1.75)

(3) y = 28/12 + 5/12 + (-1.75)

(4) y = 23/12 + (-1.75)

(5) y ≈ 0.17

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