Question

If x = 3 and y = 4 is a solution of the equation 5x – 3y = k, find the value of k.

Answer 1

Given: 5x – 3y = k
Since x = 3 and y = 4 is a solution of the given equation so, it should satisfy the equation.
$$\begin{gathered} 5\left(3\right)-3\left(4\right)=k \\ \Rightarrow 15-12=k \\ \Rightarrow 3=k \end{gathered}$$