![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
7/18.x-2/3 = 5/18
\(\Rightarrow\) 7/18.x = 5/18+2/3 = 17/18
\(\Rightarrow\) x = 17/18 : 7/18 = 17/7
Chúc bạn học tốt !
\(\frac{7}{18}.x-\frac{2}{3}=\frac{5}{18}\)=>\(\frac{7}{18}.x=\frac{17}{18}\)=>\(x=\frac{17}{18}:\frac{7}{18}=\frac{17}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
e)
7/8 . x = 4/9 - -2/3
7/8 .x = 10/9
x = 10/9 : 7/8
x = 80/63
f )
-5/7 : x = -7/18 - 1/6
-5/7 : x = -5/9
x = -5/7 : -5/9
x = 9/7
d)
7/18 . x =5/18 + 2/3
7/18 . x =17/18
x = 17/18 : 7/18
x = 17/7
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.\frac{-5}{9}+\frac{5}{9}:A=\left(-\frac{5}{9}+\frac{5}{9}\right):A=0:A=0\)
\(b.\frac{7}{25}.\frac{11}{13}-\frac{7}{25}.\frac{2}{13}-\frac{8}{25}=\frac{7}{25}.\left(\frac{11}{13}-\frac{2}{13}\right)-\frac{8}{25}=\frac{7}{25}.\frac{9}{13}-\frac{8}{25}=\frac{63}{325}-\frac{8}{25}=\frac{-41}{325}\)
C.Thua
Đúng 100%
Đúng 100%
Đúng 100%
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\Leftrightarrow\)\(x-\left(\frac{13x}{18}-\frac{4}{18}\right)=\frac{4}{9}\)
\(\Leftrightarrow\)\(\frac{18x}{18}-\frac{13x}{18}+\frac{4}{18}=\frac{4}{9}\)
\(\Leftrightarrow\)\(\frac{5x}{18}=\frac{4}{9}-\frac{4}{18}\)
\(\Leftrightarrow\)\(\frac{5x}{18}=\frac{2}{9}\)
\(\Leftrightarrow\)\(5x=\frac{18.2}{9}\)
\(\Leftrightarrow\)\(5x=4\)
\(\Leftrightarrow\)\(x=\frac{4}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(x-\frac{5}{7}=\frac{1}{9}\Rightarrow x=\frac{1}{9}+\frac{5}{7}\Rightarrow x=\frac{52}{63}\)
b) \(\frac{-3}{7}-x=\frac{4}{5}+\frac{-2}{3}\Rightarrow\frac{-3}{7}-x=\frac{2}{15}\Rightarrow x=\frac{-3}{7}-\frac{2}{15}\Rightarrow x=\frac{-59}{105}\)
c) \(x-\frac{1}{5}=\frac{2}{7}.\frac{-11}{5}\Rightarrow x-\frac{1}{5}=\frac{-22}{35}\Rightarrow x=\frac{-22}{35}+\frac{1}{5}\Rightarrow x=\frac{-3}{7}\)
d) \(\frac{x}{182}=\frac{-6}{14}.\frac{35}{91}\Rightarrow\frac{x}{182}=\frac{-15}{91}\Rightarrow x=\frac{\left(-15\right).182}{91}\Rightarrow x=-30\)
7/18.x =5/18+2/3
7/18.x=5/18+12/18
7/18.x=17/18
x=17/18:7/8
x=17/18.8/7
Tự tính tiếp và rút gọn