Ta có: \(\frac{x}{2}=\frac{15}{20}\Leftrightarrow\frac{10x}{20}=\frac{15}{20}\Leftrightarrow10x=15\Leftrightarrow x=\frac{3}{2}\)
Vậy \(x=\frac{3}{2}\)
\(\Rightarrow\)\(\frac{x}{2}\)=\(\frac{3}{4}\)
x.4=2.3
x.4=6
x =6:4
\(\Rightarrow\)x=\(\frac{6}{4}\)=\(\frac{3}{2}\)
\(\Rightarrow\)x=3
Ta có : \(\frac{15}{20}\)\(=\)\(\frac{15:5}{20:5}\)\(=\)\(\frac{3}{4}\)
Vì \(\frac{x}{2}\)\(=\)\(\frac{15}{20}\)\(\Rightarrow\)\(\frac{x}{2}\)\(=\)\(\frac{3}{4}\)
\(\Rightarrow\)x . 4 \(=\)3 . 2 \(\Rightarrow\)x.4 \(=\)6
\(\Rightarrow\)x \(=\)6 : 4 \(\Rightarrow\)x \(=\)\(\frac{6}{4}\)\(=\)\(\frac{3}{2}\)
Vậy x \(=\)\(\frac{3}{2}\)
\(\frac{x}{2}\)= \(\frac{15}{20}\)
x x 20 = 15 x 2
x x 20 = 30
x = 30 : 20
x = 1,5
