3/2 x - 2/5 = 1/3x - 1/4
3/2x - 1/3x = -1/4 + 2/5
7/6x = 3/20
x = 3/20 : 7/6
x = 9/70
\(\frac{3}{2}x-\frac{2}{5}=\frac{1}{3}x-\frac{1}{4}\) (mk lam theo cach cuamk nha)
\(\Rightarrow\frac{3}{2}x-\frac{2}{5}-\frac{1}{3}x-\frac{1}{4}=0\)
\(x\left(\frac{3}{2}-\frac{1}{3}\right)-\frac{2}{5}-\frac{1}{4}=0\)
\(x.\frac{7}{6}-\frac{2}{5}=-\frac{1}{4}\)
\(x.\frac{7}{6}=-\frac{1}{4}+\frac{2}{5}=\frac{3}{20}\)
\(x=\frac{3}{20}:\frac{7}{6}=\frac{3}{20}.\frac{6}{7}=\frac{9}{70}\)
Mk k bt dung ko nua, vi day moi la thu nghiem chua xog cua mk ^^
