Question

Give the geometric representations of $2x+9=0$ as an equation in one variable.

Answer 1

Step 1: Solve the equation

The equation is $2x+9=0$.

Upon solving this we get,

$2x+9=0$

$\Rightarrow$ $2x=-9$

$\Rightarrow$ $x=-\frac{9}{2}$

$\Rightarrow$ $x=-4.5$

Step 2: Express in one variable

The solved equation is $x=-4.5$, which is a point on the $x$-axis.

Therefore the only variable present in this linear equation is $x$.

Hence, $x=-4.5$ is represented in one variable.