Question

1)-7х=-212) 48х=-163)5х+9=04)5х+4=х-125)4х-(6-х)=13​

Answer 1

Ответ:

1)3

2)-1

/3

3)-1,8

4)-2

5)1,4

Answer 2

Let's solve each equation step by step:

1. -7x = -21

To solve for x, we need to isolate the variable. We can do this by dividing both sides of the equation by -7:

-7x / -7 = -21 / -7

This simplifies to:

x = 3

Therefore, the solution to the equation -7x = -21 is x = 3.

2. 48x = -16

Similar to the previous equation, we need to isolate x. In this case, we'll divide both sides by 48:

48x / 48 = -16 / 48

Simplifying gives us:

x = -1/3

So, the solution to the equation 48x = -16 is x = -1/3.

3. 5x + 9 = 0

We'll solve for x by isolating the variable. First, we subtract 9 from both sides:

5x + 9 - 9 = 0 - 9

Simplifying gives us:

5x = -9

Next, we divide both sides by 5:

(5x) / 5 = (-9) / 5

This simplifies to:

x = -9/5

Thus, the solution to the equation 5x + 9 = 0 is x = -9/5.

4. 5x + 4 = x - 12

To solve for x, we'll start by moving all terms involving x to one side of the equation. We can do this by subtracting x from both sides:

5x + 4 - x = x - 12 - x

Simplifying gives us:

4x + 4 = -12

Next, we'll subtract 4 from both sides:

4x + 4 - 4 = -12 - 4

Simplifying further:

4x = -16

Now, divide both sides by 4:

(4x) / 4 = (-16) / 4

This simplifies to:

x = -4

So, the solution to the equation 5x + 4 = x - 12 is x = -4.

5. 4x - (6 - x) = 13

To solve for x, let's simplify the equation step by step. Start by removing the parentheses:

4x - 6 + x = 13

Combine like terms:

5x - 6 = 13

Next, isolate x by adding 6 to both sides:

5x - 6 + 6 = 13 + 6

Simplifying gives us:

5x = 19

Finally, divide both sides by 5:

(5x) / 5 = 19 / 5

This simplifies to:

x = 19/5

Hence, the solution to the equation 4x - (6 - x) = 13 is x = 19/5.