Mathematics: What is x when: |3x–1|=8

What is x when: |3x–1|=8 - id3187150903, 2021CanadyRaniya

Ответ:

rollercoasterbuddies

30.01.2022

$\huge\boxed{x=3\ \vee\ x=-\dfrac{7}{3}}$

Step-by-step explanation:

$|a|=\left\{\begin{array}{ccc}a&\text{for}\ a\geq0\\-a&\text{for}\ a0\\==========================\\\\|3x-1|=8\iff3x-1=8\ \vee\ 3x-1=-8\\\\\begin{array}{cccc}3x-1=8&\vee&3x-1=-8&\text{add 1 to both sides}\\3x-1+1=8+1&\vee&3x-1+1=-8+1\\3x=9&\vee&3x=-7&\text{divide both sides by 3}\\\dfrac{3x}{3}=\dfrac{9}{3}&\vee&\dfrac{3x}{3}=\dfrac{-7}{3}\\x=3&\vee&x=-\dfrac{7}{3}\\\end{array}$

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Ответ:

girlgirl7230

10.07.2022

Mathematics

Let's divide 110 by 5, that equals 22. That is our middle number. Now, we will use the 2 numbers below that (22.) and the 2 numbers above that.
20+21+22+23+24= 110.
So, the 4th number is 23.

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What is x when: |3x–1|=8

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