\(\frac{2}{5}x+\frac{1}{3}x=\frac{2}{3}\Leftrightarrow\frac{11}{15}x=\frac{2}{3}\Leftrightarrow x=\frac{2}{3}:\frac{11}{15}\Leftrightarrow x=\frac{10}{11}\)
C1 : 2/5 . x + 1/3 . x = 2/3
x . ( 2/5 + 1/3 ) = 2/3
x . 11/15 = 2/3
x = ( 2/3 ) / ( 11/15 )
x = 10/11
Vậy x = 10/11
c1: 2/5 . x +1/3 . x = 2/3
x . (2/5+ 1/3) = 2/3
x . 11/15 = 2/3
x = 2/3 : 11/15
x = 2/3 . 15/11
x = 10/11
Vậy x = 10/11