2/5 . x - 1/6 = 3/4
2/5.x = 3/4 + 1/6
2/5 .x = 11/12
x = 11/12 : 2/5
x =55/24
Đúng cho tui nha
\(\frac{2}{5}.x-\frac{1}{6}=\frac{3}{4}\)
\(\frac{2}{5}.x=\frac{3}{4}+\frac{1}{6}\)
\(\frac{2}{5}.x=\frac{11}{12}\)
\(x=\frac{11}{12}:\frac{2}{5}\)
\(x=\frac{55}{24}\)