Question

[(x +y + 1 = 0(2x - y-3=0​

Answer 1

Ответ:

(2/3;-1 2/3)

Пошаговое объяснение:

х+у=-1|  применим способ сложения и получим   3х=2.  х=2/3.

2x-y=3|

Подставим данное значение х в 1-е уравнение и получим

2/3+у=-1.     у=-1-2/3.    у=-1 2/3

Answer 2

It looks like you've written a system of two linear equations. To solve for the values of x and y, you can use various methods such as substitution, elimination, or matrices. Let's solve this system using the elimination method:

The system of equations is:

1. x + y + 1 = 0
2. 2x - y - 3 = 0

We can start by multiplying the first equation by 2 to make it easier to eliminate y:

1. 2(x + y + 1) = 2(0)
2. 2x - y - 3 = 0

Now the first equation is:

3. 2x + 2y + 2 = 0

Now, we can subtract the second equation from the modified first equation to eliminate y:

(2x + 2y + 2) - (2x - y - 3) = 0 - 0

Simplify:

2x + 2y + 2 - 2x + y + 3 = 0

Now, combine like terms:

3y + 5 = 0

Subtract 5 from both sides:

3y = -5

Now, divide by 3 to isolate y:

y = -5/3

Now that we have found the value of y, we can substitute it into one of the original equations to find the value of x. Let's use the first equation:

x + (-5/3) + 1 = 0

x - 5/3 + 1 = 0

x - 5/3 + 3/3 = 0

x - 2/3 = 0

Add 2/3 to both sides:

x = 2/3

So, the solution to the system of equations is:

x = 2/3 y = -5/3