\(x+\dfrac{2}{9}\times4=\dfrac{14}{9}.\\ x+\dfrac{8}{9}=\dfrac{14}{9}.\\ x=\dfrac{14}{9}-\dfrac{8}{9}.\\ x=\dfrac{2}{3}.\\ \\ 3\times\dfrac{4}{9}+\dfrac{2}{3}-\dfrac{7}{18}.\\ =\dfrac{4}{3}+\dfrac{2}{3}-\dfrac{7}{18}.\\ =2-\dfrac{7}{18}.\\ =\dfrac{29}{18}.\)