Question

Define linear equation in one variable.

Answer 1

A linear equation is the straight line of the form $ax+b=0$ with power of $x$ is one always. Where $a\text{and}b$ are two integers and $x$ is a variable and has only one solution.
Example: If $a=1,b=2$ then $ax+b=0$ becomes $x+2=0$ is a linear equation.