a, = \(\dfrac{5}{2}.\left(2x-3\right)-\dfrac{1}{2}=\dfrac{11}{3}\)
\(\dfrac{5}{2}.\left(2x-3\right)=\dfrac{11}{3}+\dfrac{1}{2}\)
\(\dfrac{5}{2}.\left(2x-3\right)=\dfrac{25}{6}\)
\(2x-3=\dfrac{25}{6}:\dfrac{5}{2}\)
\(2x-3=\dfrac{5}{3}\)
2x = \(\dfrac{5}{3}+3\)
2x = \(\dfrac{14}{3}\)
x = \(\dfrac{14}{3}:2\)
x = \(\dfrac{7}{3}\)
Bài này mk lm r. Để mk chụp ảnh gửi cho bn nha