Question

Решите систему уравнений x-2y=-7 4x+7y=17 срочно!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

решаем методом подстановки

х= -7+2у

4 * ( -7+2у ) + 7у = 17

- 28+8у+7у = 17

15у = 17+28

15у= 45

у = 3

х= - 7 + 2* 3

х= -1

Answer 2

Solving the System of Equations

To solve the system of equations:

x - 2y = -7
4x + 7y = 17

we can use the method of substitution or elimination. Let's use the method of substitution.

1. Solve the first equation for x: ``` x = 2y - 7 ```

2. Substitute the value of x in the second equation: ``` 4(2y - 7) + 7y = 17 ```

3. Simplify and solve for y: ``` 8y - 28 + 7y = 17 15y - 28 = 17 15y = 45 y = 3 ```

4. Substitute the value of y back into the first equation to find x: ``` x = 2(3) - 7 x = -1 ```

Therefore, the solution to the system of equations is x = -1 and y = 3.

Note: The search results provided by You.com did not provide relevant information for solving this specific system of equations. The solution was obtained through the method of substitution.