Question

Tìm x, biết :

(4,5 - 2.x) .\(1\frac{4}{7}=\frac{11}{14}\)

Answer 1

( 4,5 - 2.x ) . 11/7 = 11/14

4,5 - 2.x               = 11/14 : 11/7= 1/2

         2.x             =  4,5 - 1/2 =4

             x  = 4:2=2

Answer 2

\(\left(4,5-2x\right).1\frac{4}{7}=\frac{11}{14}\)

\(\Rightarrow\left(4,5-2x\right).\frac{11}{7}=\frac{11}{14}\)

\(\Rightarrow4,5-2x=\frac{11}{14}:\frac{11}{7}\)

\(\Rightarrow4,5-2x=\frac{11}{14}.\frac{7}{11}\)

\(\Rightarrow4,5-2x=\frac{1}{2}\)

\(\Rightarrow2x=4,5-\frac{1}{2}\)

\(\Rightarrow2x=4,5-0,5\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=4:2\)

\(\Rightarrow x=2\)