Question

1) 7x - (3 + 2x) = x + 9;

Answer 1

Ответ:

Пошаговое объяснение:

1) 7x - (3 + 2x) = x + 9;

7x - 3 - 2x = x + 9

5x - 3 = x + 9

5x - x = 9 + 3

4x = 12

x = 12 : 4

x = 3

Answer 2

To solve for x in the equation 7x - (3 + 2x) = x + 9, you can follow these steps:

1. Distribute the negative sign inside the parentheses: 7x - 3 - 2x = x + 9

2. Group like terms on each side of the equation: (7x - 2x) - 3 = x + 9

3. Combine the like terms on both sides of the equation: 5x - 3 = x + 9

4. To isolate x, you can start by moving x to one side of the equation. You can do this by subtracting x from both sides: 5x - x - 3 = 9

5. Simplify the left side of the equation by subtracting x from 5x: 4x - 3 = 9

6. Next, add 3 to both sides of the equation to isolate the term with the variable: 4x - 3 + 3 = 9 + 3

7. Simplify both sides: 4x = 12

8. Finally, divide both sides by 4 to solve for x: 4x/4 = 12/4 x = 3

So, the solution to the equation is x = 3.