Question

which one the following is an example of linear equation is one variable a. x+y=3 b. x-y=3 c. x²+3=0 d. x-3=5​

Answer 1

An example of linear equation in one variable is $x-3=5$.

Correct option: d. $x-3=5$

Step-by-step explanation:

We investigate the given equations and state their category:

1. $x+y=3$ : This equation contains two variables $x$ and $y$ each of power $1$, and thus this is a linear equation of two variables.
2. $x-y=3$ : This equation contains two variables $x$ and $y$ each of power $1$, and thus this is a linear equation of two variables.
3. $x^{2}+3=0$ : This equation has one variable $x$ of power $2$, and thus this is a quadratic equation.
4. $x-3=5$ : This equation has one variable $x$ of power $1$, and thus this is a linear equation of one variable.