Question
$$y = \frac{5}{7}+4$$
Answer
$$ y = \dfrac{33}{7} $$
Explanation
$$ \begin{aligned} y &= \frac{5}{7}+4&& \text{multiply ALL terms by } \color{blue}{ 7 }. \\[1 em]7y &= 7\cdot\frac{5}{7}+7\cdot4&& \text{cancel out the denominators} \\[1 em]7y &= 5+28&& \text{simplify right side} \\[1 em]7y &= 33&& \text{ divide both sides by $ 7 $ } \\[1 em]y &= \frac{33}{7}&& \\[1 em] \end{aligned} $$
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