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Difficulty: 2/102022 NMTC 2022 (QII-62)

The solution of 2x-9 7 is ________.

Guide / Hint

Hint 1: Isolate the variable term by adding 9 to both sides of the inequality.

Hint 2: Divide both sides of by 2.

Hint 3: Write the final solution in the form .

Solution

Step 1 (Setup Inequality): We want to solve the inequality:

Step 2 (Isolate x): Add 9 to both sides of the inequality:

Step 3 (Divide by 2): Since 2 is a positive number, dividing by 2 does not flip the inequality sign:

Step 4 (Conclusion): The solution of the inequality is exactly x >= 8 (or ).

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