\(\frac{2}{5}+\frac{3}{5}.x=-\frac{1}{4}\)
\(\frac{3}{5}.x\)=\(-\frac{1}{4}\)-\(\frac{2}{5}\)
\(\frac{3}{5}.x=-\frac{13}{20}\)
\(x=-\frac{13}{20}:\frac{3}{5}\)
\(x=-\frac{13}{12}\)
Vậy \(x=-\frac{13}{12}\)
Tick giùm mình nha!!!
3/5 . x = -1/4 - (-2/5)
3/5 . x = -5/20 - (-8/20)
3/5 . x = 3/20
x = 3/20 : 3/5
x = 3/20 . 5/3
x = 1/4
\(\frac{2}{5}+\frac{3}{5}.x=-\frac{1}{4}\)
\(\Leftrightarrow\frac{3}{5}.x=-\frac{1}{4}-\frac{2}{5}\)
\(\Leftrightarrow\frac{3}{5}.x=-\frac{13}{20}\)
\(\Leftrightarrow x=-\frac{13}{20}:\frac{3}{5}\)
\(\Leftrightarrow x=-\frac{13}{12}\)
2/5 + 3/5 . x = -1/4
3/5 . x = 2/5 - -1/4
3/5 . x = 13/20
x = 13/20 : 3/5
x= 13/12
bài này làm dễ mà
