簡約 3a+2/3-6/7 a-2/9

解

簡約

3 a + \frac{2}{3} - \frac{6}{7} a - \frac{2}{9}

\frac{15 a}{7} + \frac{4}{9}

解答ステップ

3 a + \frac{2}{3} - \frac{6}{7} a - \frac{2}{9}

共通項をくくり出す

a

= a (3 - \frac{6}{7}) + \frac{2}{3} - \frac{2}{9}

3 - \frac{6}{7} = \frac{15}{7}

= a \frac{15}{7} + \frac{2}{3} - \frac{2}{9}

結合

a \frac{15}{7} + \frac{2}{3} - \frac{2}{9} : \frac{15}{7} a + \frac{4}{9}

= \frac{15}{7} a + \frac{4}{9}

簡素化

\frac{15}{7} a : \frac{15 a}{7}

= \frac{15 a}{7} + \frac{4}{9}