An equation consists of 2 expressions that are equal.
<u>A linear equation is an equation consisting of one variable (usually x) to the first power and is of the form: </u><u><em>ax + b = 0</em></u><u> or </u><u><em>ax = b</em></u><u> (where </u><u><em>a</em></u><u> and </u><u><em>b</em></u><u> are real numbers) </u>
To isolate the variable, you cancel a term on one side of the equation by using the inverse operation to 'undo' the given operation.
<em>For example, to solve the linear equation: 3x + 7 = 10</em>
<em>Subtract 7 from each side (to undo the addition symbol in front of 7)</em>
<em>Then divide by 3 to each side (to undo the 3 being multiplied to the x)</em>