Question
Fill in the missing fraction: $\square+\frac5{27}\;=\;\frac{12}{27}$
✓
Answer
${x + \frac{5}{{27}}\; = \;\frac{{12}}{{27}}}$
${x = \frac{{12}}{{27}} - \;\frac{5}{{27}} = \;\frac{{12 - 5}}{{27}} = \frac{7}{{27}}}$
Thus, $\frac{\displaystyle7}{27}+\frac5{27}\;=\;\frac{12}{27}$
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