Question

2 (х+7) =8 4(2х-7)=0 13+7х=2х-12 0,5+3х=1,5-1

Answer 1

Ответ:

Пошаговое объяснение:

$2(x+7)=8\\2x+14=8\\2x=8-14\\2x= -6\\x= -6:2\\x= -3\\\\4(2x-7)=0\\8x-28=0\\8x=28\\x=28:8\\x=3.5\\\\13+7x=2x-12\\7x-2x= -12-13\\5x= -25\\x= -25:5\\x= -5\\\\0.5+3x=1.5-1\\0.5+3x=0.5\\3x=0.5-0.5\\3x=0x=0:3\\x=0$

Answer 2

Let's solve each of the given equations step by step:

1. 2(x + 7) = 8

First, distribute the 2 to both terms inside the parentheses:

2x + 14 = 8

Subtract 14 from both sides to isolate the variable:

2x = 8 - 14 2x = -6

Divide both sides by 2 to solve for x:

x = -6/2 x = -3

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

2. 4(2x - 7) = 0

First, distribute the 4 to both terms inside the parentheses:

8x - 28 = 0

Add 28 to both sides to isolate the variable:

8x = 28

Divide both sides by 8 to solve for x:

x = 28/8 x = 3.5

Therefore, the solution to the equation is x = 3.5.

3. 13 + 7x = 2x - 12

First, subtract 2x from both sides to bring the x terms to one side:

13 + 5x = -12

Subtract 13 from both sides to isolate the variable:

5x = -12 - 13 5x = -25

Divide both sides by 5 to solve for x:

x = -25/5 x = -5

Therefore, the solution to the equation is x = -5.

4. 0.5 + 3x = 1.5 - 1

First, subtract 1 from both sides to simplify the equation:

0.5 + 3x = 0.5

Next, subtract 0.5 from both sides to isolate the variable:

3x = 0.5 - 0.5 3x = 0

Divide both sides by 3 to solve for x:

x = 0/3 x = 0

Therefore, the solution to the equation is x = 0.

To summarize the solutions:

1. x = -3
2. x = 3.5
3. x = -5
4. x = 0