# How to insert an equation with a system of linear equations or linear system

**system of linear equations**(or

**linear system**) – a collection of two or more linear equations involving the same set of variables.

How to add an equation in your document, see Working with Microsoft Equation.

To insert a **system of linear equations**, do the following:

## In the **Professional** presentation:

** 1. ** In your own equation, enter ** f (x)=**.

** 2. ** Under **Equation Tools**, on the **Design** tab,
in the **Structures** group, click the **Bracket** button:

In the **Bracket** list, under **Cases and Stacks**, choose **Cases (Two Conditions)**:

** 3. ** In every box, enter the appropriate formula,
for example:

To insert a new line for this system of linear equations, just click **Enter**:

## In the **Linear** presentation:

** 1. ** In your own equation, enter ** f (x) = {**.

** 2. ** Enter ** \eqarray** to start a system of
linear equations. Then you enter a space key, this linear formula transformed to the professional
format:

** 3. ** In the brackets, enter formulas with symbols
** @** that divide rows in the linear system:

** 4. ** Enter ** \close** to end the system of
linear equations:

Then you enter a space key, the formula transformed to the professional format:

See also how to create other types of equations.

See also this tip in French: Comment insérer un système d'équations linéaires ou un système linéaire.