Question

1)19,5-0,3=15,92)(7-0,2х)*1,4=7,563)(6,1х-13,2):1,7=3​

Answer 1

Ответ:

Пошаговое объяснение:

1)19,5-0,3х=15,9

-0.3х=15.9-19.5

-0.3х=-3.6

х=-3.6:(-0.3)

х=12

2)(7-0,2х)*1,4=7,56

7-0,2х=7.56:1.4

7-0,2х=5.4

-0.2х=5.4-7

-0.2х=-1.6

х=-1.6:(-0.2)

х=8

3)(6,1х-13,2):1,7=3​

6,1х-13,2=3*1.7

6,1х-13,2=5.1

6.1х=5.1+13.2

6.1х=18.3

х=18.3:6.1

х=3

Answer 2

Let's solve the equations step by step:

1. 19.5 - 0.3 = 19.2

2. (7 - 0.2x) * 1.4 = 7.563 First, we'll distribute the multiplication: 1.4 * 7 = 9.8

So the equation becomes: (7 - 0.2x) = 7.563 / 9.8

Now, solve for x: 7 - 0.2x = 0.77295918367 (rounded to 11 decimal places)

Subtract 7 from both sides: -0.2x = -6.22704081633

Divide by -0.2: x ≈ 31.1352040816 (rounded to 10 decimal places)

3. (6.1x - 13.2) / 1.7 = 3 First, we'll multiply both sides by 1.7 to eliminate the division: 6.1x - 13.2 = 3 * 1.7

6.1x - 13.2 = 5.1

Add 13.2 to both sides: 6.1x = 18.3

Divide by 6.1: x = 3

So the solutions to the equations are:

1. x ≈ 19.2
2. x ≈ 31.14
3. x = 3