Question

|x|=9 |x|=-1 |5/6|-|7/9| |-14|:|0,7|

Answer 1

Ответ:

Вот думаю помогла тебе .........

Answer 2

|x|= 9

х₁ = -9

х₂ = 9

|x| = -1

х = Ø

|5/6| - |7/9| = 5/6 - 7/9 = 1/18

|-14| : |0,7| = 14 : 0,7 = 20

Answer 3

It looks like you've written a series of absolute value expressions, and it appears you want to evaluate them. Let's break them down step by step:

1. |x| = 9 This means the absolute value of x is equal to 9. In this case, x can be either 9 or -9, as the absolute value of both is 9.

2. |x| = -1 The absolute value of a number is never negative, so there are no real solutions to this equation.

3. |5/6| - |7/9| Take the absolute values of the fractions and subtract them: |5/6| - |7/9| = 5/6 - 7/9

To subtract these fractions, you need to find a common denominator, which is 18 in this case: (5/6)(3/3) - (7/9)(2/2) = 15/18 - 14/18

Now, subtract the fractions: (15/18) - (14/18) = 1/18

So, |5/6| - |7/9| = 1/18

4. |-14| : |0,7| The absolute value of -14 is 14, and the absolute value of 0.7 is also 0.7.

Now, divide 14 by 0.7: 14 / 0.7 = 20

So, |-14| : |0,7| = 20

To summarize:

1. |x| = 9 has two solutions: x = 9 or x = -9.
2. |x| = -1 has no real solutions.
3. |5/6| - |7/9| = 1/18.
4. |-14| : |0,7| = 20.