Question

3x-4=8; 9-2/3x=15 5x-6=2x+3

Answer 1

Ответ:

Пошаговое объяснение:

1)3x-4=8

3x=8+4

3x=14

x=3

2) 9-2/3x=15

-2/3x=15-9

-2/3x=6

x=-9

3) 5x-6=2x+3

5x-2x=3+6

3x=9

x=3

Answer 2

Ответ:

1)переносим 4 в правую часть и меняем знак на противоположный

получается 3х=12

Делим обе стороны на 3 и получается

х=4

2)Вычитаем и получаем 7/3х=15

Умножаем обе части на 3х

Получаем 7=45х

Делим обе части на 45 и получаем 7/45

х= 0,15

3) Переносим известные в правую часть, а неизвестные в левую, получаем 5х-2х=3+6

Складываем и получаем 3х=9

делим обе части на 3 и получаем х=3

Answer 3

Let's solve each of these equations step by step:

1. 3x - 4 = 8

To solve for x in this equation, you want to isolate the variable x on one side of the equation. Start by adding 4 to both sides of the equation:

3x - 4 + 4 = 8 + 4

This simplifies to:

3x = 12

Now, divide both sides by 3 to solve for x:

3x / 3 = 12 / 3

x = 4

So, the solution to the first equation is x = 4.

2. 9 - (2/3)x = 15

First, let's get rid of the fraction by multiplying both sides of the equation by 3 to clear the denominator:

3 * (9 - (2/3)x) = 3 * 15

Now, distribute the 3 on the left side:

27 - 2x = 45

Next, subtract 27 from both sides:

27 - 27 - 2x = 45 - 27

This simplifies to:

-2x = 18

Now, divide both sides by -2 to solve for x:

(-2x) / (-2) = 18 / (-2)

x = -9

So, the solution to the second equation is x = -9.

3. 5x - 6 = 2x + 3

To solve for x in this equation, start by moving all terms containing x to one side of the equation and constants to the other side:

5x - 2x = 3 + 6

Now, simplify the left side:

3x = 9

Finally, divide both sides by 3 to solve for x:

(3x) / 3 = 9 / 3

x = 3

So, the solution to the third equation is x = 3.

To summarize:

1. x = 4
2. x = -9
3. x = 3