chết nhầm để tui sửa
x-25%x=1\2
\(x-\frac{1}{4}x=\frac{1}{2}\)
\(x\left(1-\frac{1}{4}\right)=\frac{1}{2}\)
\(x.\frac{3}{4}=\frac{1}{2}\)
\(x=\frac{1}{2}:\frac{3}{4}\)
\(x=\frac{2}{3}\)
\(x-25\%x=\frac{1}{2}\)
\(\Rightarrow x-\frac{1}{4}x=\frac{1}{2}\)
\(\Rightarrow\left(1-\frac{1}{4}\right).x=\frac{1}{2}\)
\(\Rightarrow\frac{3}{4}.x=\frac{1}{2}\Rightarrow x=\frac{1}{2}:\frac{3}{4}=\frac{1}{2}.\frac{4}{3}=\frac{2}{3}\)
Vậy x=2/3
x-25%x=1\2
\(x-\frac{1}{4}=\frac{1}{2}\)
\(x=\frac{1}{2}+\frac{1}{4}\)
\(x=\frac{3}{4}\)
x -25% = 1/2
x -1/4 = 1/2
x = 1/2 + 1/4
x = 2/4 + 1/4
x = 3/4
