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1. Given:

2. [tex]\[\frac{-3(x+8)}{-3} = \frac{-21}{-3}\][/tex]

3. Simplifying:

4. [tex]\[x + 8 = 7\][/tex]

5. Subtract 8 from both sides:

6. [tex]\[x + 8 - 8 = 7 - 8\][/tex]

7. [tex]\[x = -1\][/tex]


Sagot :

Sure, let's break down the solution to the given equation step by step.

### Step-by-Step Solution:

1. Original Equation:
[tex]\[ \frac{-3(x+8)}{-3} = \frac{-21}{-3} \][/tex]

2. Simplifying the Right-Hand Side:
- Simplify the fraction on the right-hand side by dividing [tex]\(-21\)[/tex] by [tex]\(-3\)[/tex]:
[tex]\[ \frac{-21}{-3} = 7 \][/tex]
So, the equation becomes:
[tex]\[ \frac{-3(x+8)}{-3} = 7 \][/tex]

3. Simplifying the Left-Hand Side:
- Similarly, simplify the fraction on the left-hand side by dividing [tex]\(-3(x+8)\)[/tex] by [tex]\(-3\)[/tex]:
[tex]\[ \frac{-3(x+8)}{-3} = x + 8 \][/tex]
So the equation now looks like this:
[tex]\[ x + 8 = 7 \][/tex]

4. Solving for [tex]\(x\)[/tex]:
- To isolate [tex]\(x\)[/tex], subtract 8 from both sides of the equation:
[tex]\[ x + 8 - 8 = 7 - 8 \][/tex]
Simplify the left-hand and right-hand sides:
[tex]\[ x = -1 \][/tex]

### Conclusion:

So, after solving the equation step by step, we find that:
[tex]\[ x = -1 \][/tex]

Therefore, the value of [tex]\(x\)[/tex] that satisfies the equation is [tex]\(-1\)[/tex].