Question

Решите уравнения: l?l - это значит, по модулю. 4) l3x+2l-4=0 5) l2x-1l+7=8

Answer 1

4) |3x+2| - 4 = 0
|3x+2| = 4

 3x + 2 = 4
 3x + 2 = -4

 3x = 2  | : 3,   x = 2/3
 3x = -6 | : 3,   x = -6/3 = -2 

 Ответ : 2/3 и -2

5) |2x-1| + 7 = 8
|2x-1| = 8 - 7
|2x-1| = 1

 2x - 1 = 1
 2x - 1 = -1

 2x = 2 | : 2,  x = 1
 2x = 0 | : 2,  x = 0

 Ответ : 1 и 0

Answer 2

4) Модуль - это расстояние до нуля.
I3x+2I=4. На расстоянии 4 от 0 находятся 2 точки 4 и (-4).
3х+2=4 или 3х+2=-4
3х=2 или 3х=-6
х=2/3 или х=-2
5)I2x-1I=1
2x-1=1 или 2х-1=-1
2х=2 или 2х=0
х=1 или х=0.
   

Answer 3

I can help you solve equations. Here are the solutions for the equations you asked:

4) |3x + 2| - 4 = 0

To solve this equation, we need to find the values of x that make the expression inside the absolute value equal to 4 or -4. We can write two equations:

3x + 2 = 4 or 3x + 2 = -4

Solving for x, we get:

x = 2/3 or x = -2

These are the solutions for the equation.

5) |2x - 1| + 7 = 8

To solve this equation, we need to find the values of x that make the expression inside the absolute value equal to 1 or -1. We can write two equations:

2x - 1 = 1 or 2x - 1 = -1

Solving for x, we get:

x = 1 or x = 0

These are the solutions for the equation.