\(\frac{4}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{-1}{6}+\frac{3}{4}\right)\)

\(\frac{4}{3}.\frac{-1}{3}\le x\le\frac{2}{3}.\frac{7}{12}\)

\(\frac{-4}{9}\le x\le\frac{7}{18}\)

\(\frac{-8}{18}\le x\le\frac{7}{18}\)

\(\Rightarrow\)X \(\in\) {\(\frac{-7}{18};\frac{-6}{18};\frac{-5}{18};\frac{-4}{18};\frac{-3}{18};\frac{-2}{18};\frac{-1}{18};0;\frac{1}{18};\frac{2}{18};\frac{3}{18};\frac{4}{18};\frac{5}{18};\frac{6}{18}\)}

khong biet

\(-4\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{6}\right)\le x\le-\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)

\(\Rightarrow-\frac{13}{3}.\left(\frac{3}{6}-\frac{1}{6}\right)\le x\le-\frac{2}{3}.\left(\frac{4}{12}-\frac{6}{12}-\frac{9}{12}\right)\)

\(\Rightarrow-\frac{13}{3}.\frac{2}{6}\le x\le-\frac{2}{3}.\frac{-11}{12}\)

\(\Rightarrow\frac{-13}{9}\le x\le\frac{11}{18}\)

\(\Rightarrow\frac{-26}{18}\le x\le\frac{11}{18}\)

=> -1,44444444444........... ≤ x ≤ 0,6111111111...........

Mà x ∈ Z

=> x ∈ { -1 ; 0 }

\(x\in\varnothing\) 

\(1\frac{13}{15}.0,75-\left(\frac{8}{15}+25\%\right).\frac{24}{47}-3\frac{12}{13}:3\)

\(=\frac{28}{15}.\frac{3}{4}-\left(\frac{8}{15}+\frac{1}{4}\right).\frac{24}{47}-\frac{51}{13}:3\)

\(=\frac{7}{5}-\frac{47}{60}.\frac{24}{47}-\frac{17}{13}\)

\(=\frac{7}{5}-\frac{2}{5}-\frac{17}{13}\)

\(=\frac{-4}{13}\)

\(4\frac{1}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\le x\le\frac{2}{3}.\left(\frac{1}{3}-\frac{1}{2}-\frac{3}{4}\right)\)

\(\Leftrightarrow\frac{13}{3}.\frac{-1}{3}\le x\le\frac{2}{3}.\frac{-11}{12}\)

\(\Leftrightarrow\frac{-13}{9}\le x\le\frac{-11}{18}\)

\(\Leftrightarrow x=-1\)

\((6-4\frac{1}{2}):0,03+(3\frac{1}{20}-2,65):4+\frac{2}{5}\)

\((6-4,5):0,03+(3,05-2,65):4+0,4\)

\(=1,5:0,03+0,4:4+0,4\)

\(=50+(0,4\cdot2):4\)

\(=50+0,2\)

\(=50,2\)

Chúc bạn học tốt

Ta có :

\(\frac{3}{4}-\frac{5}{6}\le\frac{x}{12}< 1-\left(\frac{2}{3}-\frac{1}{4}\right)\)

\(\frac{9}{12}-\frac{10}{12}\le\frac{x}{12}< 1-\left(\frac{8}{12}-\frac{3}{12}\right)\)

\(-\frac{1}{12}\le\frac{x}{12}< 1-\frac{5}{12}\)

\(-\frac{1}{12}\le\frac{x}{12}< \frac{7}{12}\)

\(\frac{x}{12}\in\left\{-\frac{1}{12};\frac{0}{12};\frac{1}{12};\frac{2}{12};\frac{3}{12};\frac{4}{12};\frac{5}{12};\frac{6}{12}\right\}\)

\(\Rightarrow x\in\left\{-1;0;1;2;3;4;5;6\right\}\)

Ủng hộ mk nha !!! ^_^

\(\frac{1}{3}\left(x-1\right)+\frac{2}{5}\left(x+1\right)=0\)

\(\frac{1}{3}x-\frac{1}{3}+\frac{2}{5}x+\frac{2}{5}=0\)

\(\frac{11}{15}x+\left(\frac{2}{5}-\frac{1}{3}\right)=0\)

\(\frac{11}{15}x+\frac{1}{15}=0\)

\(\frac{1}{15}\left(11x+1\right)=0\)

\(11x+1=0\)

\(\Rightarrow x=-\frac{1}{11}\)