Question

-2x=7-3(3x-7) скажите пж

Answer 1

Ответ:

4.

Объяснение:

$- 2x = 7 - 3(3x - 7).$

• Раскрываем скобки в правой части уравнения.

$- 2x = 7 - 9x + 21.$

$- 2x = 28 - 9x.$

• Переносим неизвестные в левую часть, известные в правую, знаки меняем.

$- 2x + 9x = 28.$

• Приводим подобные члены в левой части.

$7x = 28.$

$x = 28 \div 7. \\ \boxed{x = 4}.$

Answer 2

Ответ:

Пошаговое объяснение:

Answer 3

Solving the Equation -2x = 7 - 3(3x - 7)

To solve the equation -2x = 7 - 3(3x - 7), we can follow these steps:

1. Distribute the -3 inside the parentheses. 2. Combine like terms. 3. Solve for x.

Let's go through each step.

1. Distribute the -3 inside the parentheses: - The equation becomes: -2x = 7 - 9x + 21

2. Combine like terms: - Combine the constants on the right side of the equation: -2x = -9x + 28

3. Solve for x: - Add 9x to both sides of the equation to isolate x: 7x = 28 - Divide both sides by 7 to solve for x: x = 4

So, the solution to the equation -2x = 7 - 3(3x - 7) is x = 4.