Question
$$\frac{x}{3}+3 = 8$$
Answer
$$ x = 15 $$
Explanation
$$ \begin{aligned} \frac{x}{3}+3 &= 8&& \text{multiply ALL terms by } \color{blue}{ 3 }. \\[1 em]3 \cdot \frac{x}{3}+3\cdot3 &= 3\cdot8&& \text{cancel out the denominators} \\[1 em]x+9 &= 24&& \text{ move 9 to the right } \\[1 em]x &= 24-9&& \\[1 em]x &= 15&& \\[1 em]x &= 15&& \\[1 em] \end{aligned} $$
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