Question

What is the value of k if 2x - 3y =1 , 3x-4y=1 and 4x -y=k

Answer 1

7

Step-by-step explanation:

2x -3y =1 And 3x- 4y =1

in equation 1 ,

2x- 3y = 1 take x = 1+3y / 2

substitute x value in equation 2 , 3x-4y =1

then if u solve u get y = 1 and x = 2

then substitute x and y values in 4x- y =k

you get the value of k

= 4 (2) - 1

= 8-1

=7 .

Answer 2

Answer:

2x-3y=1

x= 1+3y/2

3x-4y=1

3(1+3y/2) - 4y = 1

y= -1

x = 1+3y/2

x= -1

4x-y = k

4(-1) - (-1) = k

k = -3