## Linear Equation

An equation in which the highest power of the variable is called a linear equation. A linear equation that has only one variable is called a linear equation in one variable.

The standard form of a linear equation in one variable is ax + b = c, where a, b and c are numbers and x is a variable.

You would remember that equations use the equality(=) sign;

**Example**: 3x = 10;

## Others examples of Linear Equation

Some examples of equations are:

- 2x
- 2x+1
- 6z + 10 = 2
- 12 – 5z

these are linear equations.

- x
^{2}+ 1 - y
^{2}+ 4 - x
^{2}+ 3x – 7

these are not linear equations **(highest power of variable >1 )**.

### Facts

A linear equation may have any rational number for its solution.

An equation may have linear expressions on both sides.