Question

Why the name of the chapter is LINEAR EQUATION in one variable instead of
SIMPLE equation?​

Answer 1

Answer:

A type of equation which contains one variable of degree one is called linear equation in one variable. These are commonly called simple equation but their real name is Linear equation

Answer 2

Answer:

Both the things are similar, i.e., linear equation in one variable and a simple equation.

But the reason why it is named as it is that in class 10th, you're going to study about linear equation in two variable. So that you can interpret with both of them.