Value of k , if x = 2 , y = 1 is a solution of equation 2x + 3y = k .

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4. Linear Equations in Two Variables

easy

Find the value of $k$, if $x = 2$, $y = 1$ is a solution of the equation $2x + 3y = k$.

A

$1$

B

$3$

C

$7$

D

$0$

Solution

We have $2 x+3 y=k$

Putting $x =2$ and $y =1$ in $2 x +3 y = k ,$ we get

$2(2)+3(1)= k$

$\Rightarrow$ $4+3= k$

$\Rightarrow$ $7= k$

Thus, the required value of $k =7$.

Standard 9

Mathematics

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