Question

1).{х = 3y - 7, {2x+3y = 7,2){2х + 9 y = 13;{x – 3 y = 11?​ Смотреть ответ vikakocuba77 vikakocuba77 Ответ: Должно быть правильно❤❤❤❤❤

Answer 1

Looks like you've provided a system of three linear equations in terms of $x$ and $y$:

1. $x = 3y - 7$
2. $2x + 3y = 7$
3. $2x + 9y = 13$
4. $x - 3y = 11$

To find the solution, you can solve these equations simultaneously. Let's go step by step:

Step 1: Substitute $x$ from Equation (1) into Equations (2), (3), and (4):

Substitute $x = 3y - 7$ into Equation (2):

$2(3y - 7) + 3y = 7$

Simplify this equation.

Step 2: Substitute $x$ from Equation (1) into Equation (3):

Substitute $x = 3y - 7$ into Equation (3):

$2(3y - 7) + 9y = 13$

Simplify this equation.

Step 3: Substitute $x$ from Equation (1) into Equation (4):

Substitute $x = 3y - 7$ into Equation (4):

$3y - 7 - 3y = 11$

Simplify this equation.

Step 4: Solve the system of equations obtained in Steps 1-3.

After solving, you should get values for $y$. Once you have $y$, substitute it back into Equation (1) to find $x$.

This will give you the solution to the system of equations. If you provide the results of these steps, I can help you further if needed.