Question

If x = -1 and y =2 is a solution of kx +3y =7,find the value of k.

Answer 1

k[-1]+3[2]=77-6=1value of k is 1i hope so its helpful to u

Answer 2

The value of k in the equation $kx +3y =7$ is -1.

Given,

The equation $kx +3y =7$ and x = -1 and y =2 is a solution of the equation.

To Find,

The value of k.

Solution,

The method of finding the value of k is as follows -

x = -1 and y =2 satisfies the given equation.

So we will put the values of x and y in the equation.

$kx +3y =7$  ⇒ $k(-1)+3*2 =7$

⇒ $-k+6=7$  ⇒  $k=6-7$

⇒ $k =-1$

Hence, the value of k in the equation is -1.

#SPJ3