簡約 3/4 a-(1/8 a+5)

解

簡約

\frac{3}{4} a - (\frac{1}{8} a + 5)

\frac{\frac{5}{2} a}{4} - 5

解答ステップ

\frac{3}{4} a - (\frac{1}{8} a + 5)

\frac{3}{4} a = \frac{3 a}{4}

- (\frac{1}{8} a + 5) = - \frac{1}{8} a - 5

= \frac{3 a}{4} - \frac{1}{8} a - 5

結合

\frac{3 a}{4} - \frac{1}{8} a - 5 : \frac{a ( - \frac{1}{8} \cdot 4 + 3 )}{4} - 5

= \frac{a ( - \frac{1}{8} \cdot 4 + 3 )}{4} - 5

- \frac{1}{8} \cdot 4 + 3 = \frac{5}{2}

= \frac{a \frac{5}{2}}{4} - 5

= \frac{\frac{5}{2} a}{4} - 5