Question

Допоможіть , дуже потрібно

Answer 1

$\left ( \frac{1}{4}-\left ( \frac{1}{4}+\frac{1}{9} \right ):\frac{1}{9} \right )\cdot \left ( \frac{2}{3}+\frac{7}{15}:\left ( 0,4-\frac{1}{6} \right ) \right )=\left ( \frac{1}{4}-\left ( \frac{1}{4}:\frac{1}{9}+\frac{1}{9}:\frac{1}{9} \right ) \right )\cdot \left ( \frac{2}{3}+\frac{7}{15}:\left ( \frac{2}{5}-\frac{1}{6} \right ) \right )=$$=\left ( \frac{1}{4}-\left ( \frac{9}{4}+1 \right ) \right )\cdot \left ( \frac{2}{3}+\frac{7}{15}:\frac{7}{30} \right )=-3\cdot \left ( \frac{2}{3}+2 \right )=-3\cdot \frac{8}{3}=-8$