\(\text{X : 0,25 - X = 15,6}\)
\(x:\left(0,25-1\right)=15,6\)
\(x.\left(\frac{-3}{4}\right)=\frac{78}{5}\)
\(x=\frac{78}{5}:\left(\frac{-3}{4}\right)\)
\(x=-20,8\)
chúc bạn học tốt
\(x\div0,25-x=15,6\)
\(\Leftrightarrow\)\(x\div\frac{1}{4}-x=15,6\)
\(\Leftrightarrow\)\(x\times4-x=15,6\)
\(\Leftrightarrow\)\(x\times\left(4-1\right)=15,6\)
\(\Leftrightarrow\)\(x\times3=15,6\)
\(\Leftrightarrow\)\(x=15,6\div3\)
\(\Leftrightarrow\)\(x=5,2\)
5,2 nhé!!!!!!!!
