High School

Look at Mia's work.

[tex]
\[
\begin{aligned}
83 \cdot n & = 110 \\
83 \cdot 83 \cdot n & = 110 \cdot 83 \\
n & = 193
\end{aligned}
\]
[/tex]

What was Mia's error?

A. Mia's work is correct.
B. Mia made an addition error when adding 110 and 83.
C. Mia only needed to add 83 to 110.
D. Mia should have subtracted 83 from both sides of the equation.

Answer :

Let's look at Mia's work and identify the error step by step.

1. Original Equation: Mia starts with the equation [tex]\(83 \cdot n = 110\)[/tex].

2. Mia's Mistake: She then multiplies both sides by 83. This is incorrect. The goal is to solve for [tex]\(n\)[/tex], which means we want to isolate [tex]\(n\)[/tex] on one side of the equation.

3. Correct Approach: Instead of multiplying, Mia should divide both sides of the equation by 83 to solve for [tex]\(n\)[/tex].

4. Correct Step:

- Start with the equation: [tex]\(83 \cdot n = 110\)[/tex].
- Divide both sides by 83 to isolate [tex]\(n\)[/tex]:
[tex]\[
n = \frac{110}{83}
\][/tex]

5. Finding [tex]\(n\)[/tex]: When you calculate [tex]\(\frac{110}{83}\)[/tex], you get approximately 1.3253.

Therefore, the correct solution is that [tex]\(n \approx 1.3253\)[/tex], and Mia's error was in incorrectly multiplying both sides by 83 instead of dividing.