**Linear Equations:** The general form of a linear equation is ax + by + c =0 where a, b, c are constants and . A linear equation may contain one variable or two variables

**Example:** Solve for x: 6x-18 = 0Adding ‘18’ on both sides gives

6x = 18. x=18/6 **x = 3**.**Graphs: **The graph of a linear equation is always a straight line

**Linear Inequalities: **Linear inequalities are similar to linear equations except for few differences.

**Example: **Solve 2x – 8 < 4 and graph the solution set on number line.

**Graphs: **The graph of a linear inequality is a straight line with open or closed half planes.

Graph y** < x – 2 Graph y < x – 2**

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