\(\frac{2}{3}x+\frac{1}{2}x=\frac{15}{12}\)
\(x.\left(\frac{2}{3}+\frac{1}{2}\right)=\frac{5}{4}\)
\(x.\left(\frac{4}{6}+\frac{3}{6}\right)=\frac{5}{4}\)
\(x.\frac{7}{6}=\frac{5}{4}\)
\(x=\frac{5}{4}:\frac{7}{6}\)
\(x=\frac{30}{28}\)
\(x=\frac{15}{14}\)
đặt x ra ngoài,trong ngoặc có cái chi cái chi ó,rùi tính!
eh eh eh kb eh
kb eh!!!=)