Question

Write any one solution of equation $x+2y=7$.

Answer 1

Determine a solution of equation $x+2y=7$:

Any $\left(x,y\right)$ that satisfies the equation $x+2y=7$ is called it's solution.

Now, let $x=3$

Then,

$\begin{array}{rcl}3+2y& =& 7\\ & \Rightarrow & 2y=7-3\\ & \Rightarrow & 2y=4\\ & \Rightarrow & y=\frac{4}{2}\\ & \Rightarrow & y=2\end{array}$

Therefore, $\left(3,2\right)$ is one solution of equation $x+2y=7$.