1/4 * 1/5 * x = 1/2
1/20 *x = 1/2
x = 1/2 :1/20
x = 1/2 * 20/1
x = 10
\(\frac{1}{4}\times\frac{1}{5}X=\frac{1}{2}\)
\(\Leftrightarrow\frac{1}{20}X=\frac{1}{2}\)
\(\Leftrightarrow X=\frac{1}{2}\div\frac{1}{20}\)
\(\Leftrightarrow x=10\)
\(\frac{1}{4}\cdot\frac{1}{5}\cdot x=\frac{1}{2}\)
\(\frac{1}{20}\cdot x=\frac{1}{2}\)
\(x=\frac{1}{2}:\frac{1}{20}\)
\(x=10\)
=))
=>1/4.1/5x=1/2 NHỚ K NHÉ MOI NGƯỜI
=>1/20x=1/2
=>x=1/2:1/20
=>x=1/2.20/1
=>x=10
\(\frac{1}{4}.\frac{1}{5}.x=\frac{1}{2}\)
\(\Leftrightarrow\frac{1}{20}.x=\frac{1}{2}\)
\(\Leftrightarrow x=\frac{1}{2}:\frac{1}{20}\)
\(\Leftrightarrow x=\frac{1}{2}.20\)
\(\Leftrightarrow x=2\)
1/4.1/5.x=1/2
1/20.x=1/2
x=1/2 :1/20
x=10
Vậy x=10
~# hok tốt #~