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Solve the following inequality and show the solution on the number line - Junior Cycle Mathematics - Question a - 2013

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Solve the following inequality and show the solution on the number line. $$ -2 rac{1}{2} < \frac{1}{2} x - 3 < 1, \ x \in \mathbb{N} $$

Worked Solution & Example Answer:Solve the following inequality and show the solution on the number line - Junior Cycle Mathematics - Question a - 2013

Step 1

Solve the inequality

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Answer

We start with the inequality:

212<12x3<1-2 \frac{1}{2} < \frac{1}{2} x - 3 < 1

  1. Rewrite the first part of the inequality:

    2.5<12x3-2.5 < \frac{1}{2} x - 3

    Adding 3 to all sides:

    0.5<12x0.5 < \frac{1}{2} x

    Multiplying by 2:

    1<x1 < x

  2. Now for the second part of the inequality:

    12x3<1\frac{1}{2} x - 3 < 1

    Adding 3 to both sides:

    12x<4\frac{1}{2} x < 4

    Multiplying by 2:

    x<8x < 8

  3. Combining the two results gives:

    1<x<81 < x < 8

  4. Thus, the integer solutions for xNx \in \mathbb{N} are:

    x=2,3,4,5,6,7x = 2, 3, 4, 5, 6, 7

  5. On the number line, you highlight the integers between 1 and 8 (not including 1 and 8).

Number Line

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