Question
Find the value of each unknown:
3n = 10 + n
3n = 10 + n
✓
Answer
3n = 10 + n
Subtract n from both sides
3n – n = 10 + n – n
⇒ 2n = 10
Divide both sides by 2
$\begin{array}{l}\frac{2 n}{2}=\frac{10}{2} \\ \Rightarrow n=5\end{array}$
Subtract n from both sides
3n – n = 10 + n – n
⇒ 2n = 10
Divide both sides by 2
$\begin{array}{l}\frac{2 n}{2}=\frac{10}{2} \\ \Rightarrow n=5\end{array}$
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