Final answer:
To solve the inequality 4x - 3 ≥ 21, add 3 to both sides and divide by 4 to isolate the variable x. The solution is x ≥ 6. Hence the correct answer is option A
Step-by-step explanation:
To solve the inequality 4x - 3 ≥ 21, we can add 3 to both sides of the inequality to isolate the variable. This gives us 4x ≥ 24. Then, we divide both sides of the inequality by 4 to solve for x. This gives us x ≥ 6. Therefore, the solution is x greater than or equal to 6, which corresponds to option A.