The solution of the inequality x+3 ≤ 21 is given as B) x ≤ 18
How to solve the inequality
When solving inequalities, we should first make it a goal to isolate the variable (in this question we have x) on one side of the inequality sign.
Given the inequality: x + 3 ≤ 21
To solve it, you want to isolate x. Begin by leaving x alone on one side of the inequality. To do this, you perform operations to both sides to make x the subject
The question is given as x+3 ≤ 21
To solve, the first thing to do is to subtract 3 from each side of the inequality
x+3 - 3 ≤ 21 - 3
This would help to isolate 3
When we perform the operation we would have the solution as
x ≤ 18
Hence option B is correct
Question
Which of the following is a solution to the inequality? x+3 ≤ 21
A) x ≥ 18
B) x ≤ 18
C) x ≥ 24
D) x ≤ 24