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Determine the value of x satisfying |3x - 2| >= 7.

Mathematics

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4 parts
c

x≤−53orx≥3x \le -\frac{5}{3} \quad \text{or} \quad x \ge 3

d

x<−4orx>6x < -4 \quad \text{or} \quad x > 6

e

x≤−10orx≥4x \le -10 \quad \text{or} \quad x \ge 4

f

x=1orx=−7x = 1 \quad \text{or} \quad x = -7

Step-by-step solution

12 steps

Here are the solutions for the given problems.

Part c· 3 steps

Determine the value of xx satisfying ∣3x−2∣≥7|3x - 2| \ge 7.

  1. Split the absolute value inequality into two separate inequalities.

    For an inequality of the form ∣A∣≥B|A| \ge B, we have A≥BA \ge B or A≤−BA \le -B.

    3x−2≥7or3x−2≤−73x - 2 \ge 7 \quad \text{or} \quad 3x - 2 \le -7
  2. Solve the first inequality.

    3x−2≥73x - 2 \ge 7 3x≥7+23x \ge 7 + 2 3x≥93x \ge 9 x≥93x \ge \frac{9}{3} x≥3x \ge 3
  3. Solve the second inequality.

    3x−2≤−73x - 2 \le -7 3x≤−7+23x \le -7 + 2 3x≤−53x \le -5 x≤−53x \le -\frac{5}{3}

    The solution is the union of these two intervals.

    x≤−53orx≥3\boxed{x \le -\frac{5}{3} \quad \text{or} \quad x \ge 3}

Part d

x<−4orx>6x < -4 \quad \text{or} \quad x > 6

Determine the value of xx satisfying ∣x−1∣>5|x - 1| > 5.

  1. Split the absolute value inequality into two separate inequalities.

    For an inequality of the form ∣A∣>B|A| > B, we have A>BA > B or A<−BA < -B.

    x−1>5orx−1<−5x - 1 > 5 \quad \text{or} \quad x - 1 < -5
  2. Solve the first inequality.

    x−1>5x - 1 > 5 x>5+1x > 5 + 1 x>6x > 6
  3. Solve the second inequality.

    x−1<−5x - 1 < -5 x<−5+1x < -5 + 1 x<−4x < -4

    The solution is the union of these two intervals.

    x<−4orx>6\boxed{x < -4 \quad \text{or} \quad x > 6}

Part e

x≤−10orx≥4x \le -10 \quad \text{or} \quad x \ge 4

Determine the value of xx satisfying ∣x+3∣≥7|x + 3| \ge 7.

  1. Split the absolute value inequality into two separate inequalities.

    For an inequality of the form ∣A∣≥B|A| \ge B, we have A≥BA \ge B or A≤−BA \le -B.

    x+3≥7orx+3≤−7x + 3 \ge 7 \quad \text{or} \quad x + 3 \le -7
  2. Solve the first inequality.

    x+3≥7x + 3 \ge 7 x≥7−3x \ge 7 - 3 x≥4x \ge 4
  3. Solve the second inequality.

    x+3≤−7x + 3 \le -7 x≤−7−3x \le -7 - 3 x≤−10x \le -10

    The solution is the union of these two intervals.

    x≤−10orx≥4\boxed{x \le -10 \quad \text{or} \quad x \ge 4}

Part f

x=1orx=−7x = 1 \quad \text{or} \quad x = -7

Determine the value of xx satisfying ∣x+3∣=4|x + 3| = 4.

  1. Split the absolute value equation into two separate equations.

    For an equation of the form ∣A∣=B|A| = B, we have A=BA = B or A=−BA = -B.

    x+3=4orx+3=−4x + 3 = 4 \quad \text{or} \quad x + 3 = -4
  2. Solve the first equation.

    x+3=4x + 3 = 4 x=4−3x = 4 - 3 x=1x = 1
  3. Solve the second equation.

    x+3=−4x + 3 = -4 x=−4−3x = -4 - 3 x=−7x = -7

    The solutions are the two values of xx.

    x=1orx=−7\boxed{x = 1 \quad \text{or} \quad x = -7}
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