\(=18x\left(\frac{19}{21}+\frac{8}{9}\right)\)
\(=18x\frac{113}{63}\)
\(=\frac{226}{7}\)
18 x ( \(\frac{19}{21}\)+ \(\frac{8}{9}\)) = 18 x \(\frac{35}{21}\)= 30
18 x (19191919/21212121 + 88888/99999)
=18 x(19/21 + 8/9)
=18 x 339/189
=6102/189
có đúng không mọi người ming cần gấp
thank you very much