Question

|5-3x|=-7 |8,2х-7-4,9х|=2 -5*|Х+9|=0

Answer 1

Ответ:

x1=-4

x2=4

Пошаговое объяснение:

это первое!!!!

Answer 2

To solve the equations given, let's break them down one by one:

1. |5 - 3x| = -7

This equation has an absolute value on the left side. Absolute values cannot be negative, so there are no solutions for this equation. There are no values of x that will make the left side equal to -7.

2. |8.2x - 7 - 4.9x| = 2

Combine like terms:

|3.3x - 7| = 2

Now, we'll split this into two cases because the absolute value can be either positive or negative:

Case 1: 3.3x - 7 = 2

Add 7 to both sides:

3.3x = 2 + 7 3.3x = 9

Divide by 3.3:

x = 9 / 3.3 x ≈ 2.727

Case 2: 3.3x - 7 = -2

Add 7 to both sides:

3.3x = -2 + 7 3.3x = 5

Divide by 3.3:

x = 5 / 3.3 x ≈ 1.515

So, there are two possible solutions for this equation: x ≈ 2.727 and x ≈ 1.515.

3. -5|х + 9| = 0

This equation is straightforward:

-5|x + 9| = 0

Since -5 multiplied by anything equals 0, this equation has only one solution:

x + 9 = 0

Subtract 9 from both sides:

x = -9

So, the solution for this equation is x = -9.

In summary, the solutions to the equations are:

1. No solution for |5 - 3x| = -7.
2. Two solutions for |8.2x - 7 - 4.9x| = 2: x ≈ 2.727 and x ≈ 1.515.
3. One solution for -5|х + 9| = 0: x = -9.