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Which relationships are equivalent to [tex]|3x - 9| - 24 = -12[/tex]?

A. [tex]3x - 9 = -36[/tex] or [tex]3x - 9 = 36[/tex]

B. [tex]x = -9[/tex] or [tex]x = 15[/tex]

C. [tex]3x - 9 = -12[/tex] or [tex]3x - 9 = 12[/tex]

D. [tex]x = -1[/tex] or [tex]x = 7[/tex]

E. [tex]|3x - 9| = 12[/tex]

F. [tex]|3x - 9| = 36[/tex]

Sagot :

GinnyAnswer
Given the equation [tex]\(|3x - 9| - 24 = -12\)[/tex], let's simplify it to understand which relationships are equivalent.

Step-by-Step Simplification:

1. Starting Equation:
[tex]\[ |3x - 9| - 24 = -12 \][/tex]

2. Isolate the Absolute Value Expression:
Add 24 to both sides:
[tex]\[ |3x - 9| - 24 + 24 = -12 + 24 \][/tex]
[tex]\[ |3x - 9| = 12 \][/tex]
So, the equation simplifies to:
[tex]\[ |3x - 9| = 12 \][/tex]

3. Solving the Absolute Value Equation:
The absolute value equation [tex]\(|A| = B\)[/tex] has two solutions:
[tex]\[ A = B \quad \text{or} \quad A = -B \][/tex]
For our equation [tex]\(|3x - 9| = 12\)[/tex], the solutions are:
[tex]\[ 3x - 9 = 12 \quad \text{or} \quad 3x - 9 = -12 \][/tex]

4. Solve for [tex]\(x\)[/tex] in Both Cases:
- Case 1: [tex]\(3x - 9 = 12\)[/tex]
[tex]\[ 3x = 12 + 9 \][/tex]
[tex]\[ 3x = 21 \][/tex]
[tex]\[ x = 7 \][/tex]

- Case 2: [tex]\(3x - 9 = -12\)[/tex]
[tex]\[ 3x = -12 + 9 \][/tex]
[tex]\[ 3x = -3 \][/tex]
[tex]\[ x = -1 \][/tex]

So, the solutions to the simplified equation are [tex]\(x = 7\)[/tex] and [tex]\(x = -1\)[/tex].

Based on this, we can determine which relationships are equivalent to [tex]\(|3x - 9| - 24 = -12\)[/tex]:

1. [tex]\(3x - 9 = -36\)[/tex] or [tex]\(3x - 9 = 36\)[/tex]
- These equations are not equivalent to [tex]\(|3x - 9| = 12\)[/tex].

2. [tex]\(x = -9\)[/tex] or [tex]\(x = 15\)[/tex]
- These solutions do not match our simplified equation [tex]\(|3x - 9| = 12\)[/tex].

3. [tex]\(3x - 9 = -12\)[/tex] or [tex]\(3x - 9 = 12\)[/tex]
- These are equivalent to the simplified equation [tex]\(|3x - 9| = 12\)[/tex].

4. [tex]\(x = -1\)[/tex] or [tex]\(x = 7\)[/tex]
- These are the solutions to our simplified equation, so they are equivalent.

5. [tex]\(|3x - 9| = 12\)[/tex]
- This is the simplified form of our original equation, so it is obviously equivalent.

6. [tex]\(|3x - 9| = 36\)[/tex]
- This equation is not equivalent to the simplified form [tex]\(|3x - 9| = 12\)[/tex].

Thus, the correct answers are:

- [tex]\(3 x-9=-12\)[/tex] or [tex]\(3 x-9=12\)[/tex]
- [tex]\(x=-1\)[/tex] or [tex]\(x=7\)[/tex]
- [tex]\(|3 x-9|=12\)[/tex]
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