Question

Find the value of k, if x = 2, y = 1 is a solution of the equation -7x - 5y = k.

Answer 1

Answer:

Given - X= 2

- y= 1

To find - value of k

solution-

putting value of x and y im the equation

-7x-5y= k

-7(2)- 5(1)= k

-14-5= k

-19= k

value of k is (-19 )

checking answer

-7(2)-5(1)= (-19)

-14-5= (-19)

-19= (-19)

LHS = RHS

hence, verified

Answer 2

Given :

• Value of x = 2
• Value of y = 1
• Equation = -7x-5y=k

To Find :

• Value of k.

Solution :

$\longmapsto\tt\bold{Putting\:x=2}$

$\longmapsto\tt\bold{Putting\:y=1}$

Now :

$\longmapsto\tt{-7x-5y=k}$

$\longmapsto\tt{-7(2)-5(1)=k}$

$\longmapsto\tt{-14-5=k}$

$\longmapsto\tt\bold{k=-19}$

So , The value of k is -19...

_______________________

VERIFICATION :

$\longmapsto\tt{-7x-5y=-19}$

$\longmapsto\tt{-7(2)-5(1)=-19}$

$\longmapsto\tt{-14-5=-19}$

$\longmapsto\tt\bold{-19=-19}$

HENCE VERIFIED