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Interval notion is the representation of the given set of numbers between two real numbers. The closed interval is represented by '[ ]'. The open interval is represented by '( )'. The online tool used write the given set of numbers in an interval notation is called as Interval notation calculator.

Given is an inequality 3 x - 9 > 6.

Add 9 on both sides of the equation.

3 x - 9 + 9 > 6 + 9 3 x > 15.

Now divide 3 on both sides of the equation.

3 x/ 3 > 15/ 3 x > 5

The solution to the given inequality is all the values greater than 5.

Given is an inequality 2 x + 4 < 20.

Subtract 4 on both sides of the equation.

2 x + 4 - 4 < 20 -4 2 x < 16.

Now divide by 2 on both sides of the equation.

2 x/ 2 < 16/ 2 x < 8

The solution to the given inequality is all the values less than 8.