Question

7(2х+3)=21.решить ур.​

Answer 1

14х +21=21

14х=0

х=0

ну как-то так

Answer 2

1способ:

7 ( 2х + 3 ) = 21

7 * 2х + 7 * 3 = 21

14х + 21 = 21

14х = 21 - 21

14х = 0

х = 0 : 14

х = 0

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2 способ:

7 ( 2х + 3 ) = 21

2х + 3 = 21 : 7

2х + 3 = 3

2х = 3 - 3

2х = 0

х = 0 : 2

х = 0

Answer 3

To solve the equation 7(2x + 3) = 21, we will follow the steps below:

1. Distribute the 7 to the terms inside the parentheses: 14x + 21 = 21

2. Move the constant term to the other side of the equation by subtracting 21 from both sides: 14x = 21 - 21 14x = 0

3. Divide both sides of the equation by 14 to isolate x: (14x)/14 = 0/14 x = 0/14 x = 0

Therefore, the solution to the equation 7(2x + 3) = 21 is x = 0.