Question

If $(2,0)$ is a solution of the linear equation $2x+by=k$, then value of $k$ is:

• A. $4$
• B. $6$
• C. $5$
• D. $2$

Answer 1

Answer: (A)

$4$

For $(2,0)$ being a solution of $2x+by=k$

Put $x=2$ and $y=0$ in given expression:

$\Rightarrow 2\times 2+b\times 0=k$

$\Rightarrow k=4$