The inequality x less-than-or-equal-to 6 represents the solution set of the inequality, the correct option is D.
What is an Inequality?
An Inequality is the mathematical statement formed when two expressions are equated using an inequality operator.
The solution of the inequality 5x -9 ≤ 21 has to be determined
5x - 9 ≤ 21
Adding +9 on both the sides of the inequality
5x -9 +9 ≤ 21+9
5x ≤ 30
Dividing 5 on both the sides
x ≤ 6
Therefore, x less-than-or-equal-to 6 represents the solution set of the inequality, the correct option is D.
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