Question

1). 2х = 18 - х 2). 9х + 4 = 48 – 2х 3). 7х + 3 = 30 – 2х 4). 7 – 2х = 3х - 18 5). 0,4х + 3,8 = 2,6 – 0,8х

Answer 1

Ответ:

Пошаговое объяснение:

1) 2х+х=18

3х=18

х=18:3

х=6

2) 9х+2х=48-4

11х=44

х=4

3)7х+2х=30-3

9х=27

х=3

4)-2х-3х=-18-7

-5х=-25

х=5

5)0,4х+0,8х=2,6-3,8

1,2х=-1,2

х=-1

Answer 2

It looks like you have provided a set of equations. You want to solve each of them for the variable "x." Let's go through each equation step by step:

Equation 1: 2x = 18 - x

Add "x" to both sides of the equation: 2x + x = 18 3x = 18

Now, divide both sides by 3 to solve for "x": x = 18 / 3 x = 6

Equation 2: 9x + 4 = 48 - 2x

Add "2x" to both sides of the equation: 9x + 2x + 4 = 48 11x + 4 = 48

Subtract 4 from both sides of the equation: 11x = 44

Divide both sides by 11 to solve for "x": x = 44 / 11 x = 4

Equation 3: 7x + 3 = 30 - 2x

Add "2x" to both sides of the equation: 7x + 2x + 3 = 30 9x + 3 = 30

Subtract 3 from both sides of the equation: 9x = 27

Divide both sides by 9 to solve for "x": x = 27 / 9 x = 3

Equation 4: 7 - 2x = 3x - 18

Add "2x" to both sides of the equation: 7 = 5x - 18

Add 18 to both sides of the equation: 7 + 18 = 5x 25 = 5x

Divide both sides by 5 to solve for "x": x = 25 / 5 x = 5

Equation 5: 0.4x + 3.8 = 2.6 - 0.8x

Add 0.8x to both sides of the equation: 0.4x + 0.8x + 3.8 = 2.6 1.2x + 3.8 = 2.6

Subtract 3.8 from both sides of the equation: 1.2x = -1.2

Divide both sides by 1.2 to solve for "x": x = -1.2 / 1.2 x = -1

So, the solutions for each equation are:

1. x = 6
2. x = 4
3. x = 3
4. x = 5
5. x = -1