Question

tìm x biết

7/9-(5/6-x/3)=3/4

3/4 là 3 trên 4 hoặc là 3 phần 4 nhé

Answer 1

\(\frac{7}{9}-\left(\frac{5}{6}-\frac{x}{3}\right)=\frac{3}{4}\)

\(\Rightarrow\frac{5}{6}-\frac{x}{3}=\frac{1}{36}\)

\(\Rightarrow\frac{x}{3}=\frac{29}{36}\Rightarrow36x=29\cdot3\)

\(\Rightarrow36x=87\)

\(\Rightarrow x=\frac{29}{12}\)

 

Answer 2

\(\frac{7}{9}-\left(\frac{5}{6}-\frac{x}{3}\right)=\frac{3}{4}\)

\(\Rightarrow\frac{5}{6}-\frac{x}{3}=\frac{7}{9}-\frac{3}{4}=\frac{1}{36}\)

\(\Rightarrow\frac{x}{3}=\frac{5}{6}-\frac{1}{36}=\frac{29}{36}\)

\(\Rightarrow36.x=29.3\)

\(\Rightarrow36.x=87\Rightarrow x=\frac{87}{36}=\frac{29}{12}\)