Linear Equation/Examples

Examples of Linear Equations

Arbitrary Example

The equation:

$x + 3 y + 2 z = 7$

is a linear equation in $3$ variables.

Arbitrary Non-Linear Equation

The equation:

$b = a_1 {x_1}^2 + a_2 {x_2}^2 + a_3 {x_3}^2$

is not a linear equation, because all the $x$ terms are squared.