Question

2/9*(1,8-1 1/2а)-1 1/6(1,2-2/7а) упростить подробно срочно посиб

Answer 1

=2/9*95-29*32а-76*6/5+76*2/7а=25-13а-75+13а=-55=-1

Answer 2

$frac{2}{9}*(1,8-1frac{1}{2}a)-1frac{1}{6}(1,2-frac{2}{7}a)= frac{2}{9}*(frac{9}{5}-frac{3}{2}a)-frac{7}{6}(frac{6}{5}-frac{2}{7}a)=\\=frac{9*2}{5*9}-frac{3*2}{2*9}a-frac{6*7}{5*6}+frac{2*7}{7*6}a=frac{2}{5}-frac{3}{9}a-frac{7}{5}+frac{2}{6}a=frac{2}{5}-frac{1}{3}a-frac{7}{5}+frac{1}{3}a=\\=frac{2}{5}-frac{7}{5}=frac{2-7}{5}=frac{-5}{5}=-1$
Ответ -1