Question

If (1, –1) is a solution of the equation 2x + y = k, then find the value of k.​

Answer 1

Answer:

~ given that 1 and -1 are the solutions

that mean x = 1 and y = -1

~ Which gives us 2(1) + ( -1) = K

2 - 1 = K

Therefore 1 = K

Step-by-step explanation:

Answer 2

Correct question:

If x = 1, y = -1 is the solution of the equation 2x + y = k, then find the value of k.

The value of k is 1.

Given:

The solution of the equation 2x + y = k is x = 1, y = -1.

To Find:

Here, we have given the solution to the equation $2x+y=k$ is $(x=1,y=-1)$

now, we will put the value of x and y in the given quadratic equation.

here we get,

$=2(1)+(-1)=k$

now, after putting the value of x and y, we will calculate the above equation.

here, we get

$=2-1=k$

therefore, $k=1.$

Hence, the value of k is 1.