Question

ПОМОГИТЕ ПОЖАЛУЙСТА 30 Б ДАЮ ​

Answer 1

Пошаговое объяснение:

4.

$\displaystyle\\\frac{1}{6} *(4a-2)-\frac{1}{5}* (5b+6)=\frac{6}{4}a-\frac{2}{6} -\frac{5}{5}b -\frac{6}{5} =\frac{2}{3}a-b-\frac{1}{3}-\frac{6}{5} =\\\\ = \frac{2}{3} *2\frac{1}{4}-\frac{4}{5}-\frac{1}{3}-\frac{6}{5}=\frac{2}{3}*\frac{9}{4} -\frac{10}{5}-\frac{1}{3} =\frac{3}{2}-2 -\frac{1}{3}=\frac{3*3-1*2}{2*3} -2=\\\\ =\frac{9-2}{6} -2=\frac{7}{6}-2=1\frac{1}{6}-2=-\frac{5}{6} .$