Question

If $(4,3)$ is a solution of linear equation $3x+4y=k$, then find the value of $k$.

• A. $17$
• B. $36$
• C. $24$
• D. $40$

Answer 1

The correct option is C $24$

If $(4,3)$ is the solution of the equation $3x+4y=k$, then substitute $x=4$ and $y=3$ in the equation $3x+4y=k$ as shown below:

$(3\times 4)+(4\times 3)=k$

$\Rightarrow 12+12=k$

$\Rightarrow k=24$

Hence, the solution is $k=24$.