Question

1)18x=92)2x=18-x3)7x+3=30-2x​

Answer 1

Ответ:

Пошаговое объяснение:

1)18x=9

х=9:18

х=0.5

2)2x=18-x

2х+х=18

3х=18

х=18:3

х=6

3)7x+3=30-2x​

7х+2х=30-3

9х=27

х=27:9

х=3

Answer 2

Let's solve each of these linear equations one by one:

1. 18x = 9

To solve for x, divide both sides by 18:

18x/18 = 9/18

x = 1/2

So, the solution is x = 1/2.

2. 2x = 18 - x

First, add x to both sides to isolate the x terms on one side of the equation:

2x + x = 18

Combine like terms:

3x = 18

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

3x/3 = 18/3

x = 6

So, the solution is x = 6.

3. 7x + 3 = 30 - 2x

First, add 2x to both sides to isolate the x terms on one side of the equation:

7x + 2x + 3 = 30

Combine like terms:

9x + 3 = 30

Next, subtract 3 from both sides:

9x + 3 - 3 = 30 - 3

9x = 27

Now, divide both sides by 9 to solve for x:

9x/9 = 27/9

x = 3

So, the solution is x = 3.