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Solve the following inequalities and represent their solutions on a number line: -6x + 12 > 0, 3(4x - 2) igh tarrow= 6, and 3 − 4x < 11.

Mathematics

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Answer

x<2x < 2

x≥1x \ge 1

x>−2x > -2

Step-by-step solution

7 steps

Here are the solutions to the inequalities:

1) Solve −6x+12>0-6x + 12 > 0

  1. Subtract 12 from both sides.

    −6x>−12-6x > -12
  2. Divide both sides by -6.

    Remember to reverse the inequality sign when dividing by a negative number.

    −6x−6<−12−6\frac{-6x}{-6} < \frac{-12}{-6} x<2x < 2

    The solution is x<2\boxed{x < 2}.

    Graphical Representation:
    Draw a number line. Place an open circle at 2 (since xx is strictly less than 2, 2 is not included). Draw an arrow extending to the left from the open circle, indicating all numbers less than 2.

    2) Solve 3(4x−2)≥63(4x - 2) \ge 6

  3. Distribute the 3 on the left side.

    12x−6≥612x - 6 \ge 6
  4. Add 6 to both sides.

    12x≥6+612x \ge 6 + 6 12x≥1212x \ge 12
  5. Divide both sides by 12.

    12x12≥1212\frac{12x}{12} \ge \frac{12}{12} x≥1x \ge 1

    The solution is x≥1\boxed{x \ge 1}.

    Graphical Representation:
    Draw a number line. Place a closed circle (or shaded circle) at 1 (since xx is greater than or equal to 1, 1 is included). Draw an arrow extending to the right from the closed circle, indicating all numbers greater than or equal to 1.

    3) Solve 3−4x<113 - 4x < 11

  6. Subtract 3 from both sides.

    −4x<11−3-4x < 11 - 3 −4x<8-4x < 8
  7. Divide both sides by -4.

    Remember to reverse the inequality sign when dividing by a negative number.

    −4x−4>8−4\frac{-4x}{-4} > \frac{8}{-4} x>−2x > -2

    The solution is x>−2\boxed{x > -2}.

    Graphical Representation:
    Draw a number line. Place an open circle at -2 (since xx is strictly greater than -2, -2 is not included). Draw an arrow extending to the right from the open circle, indicating all numbers greater than -2.

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