+) Nếu \(x\ge\dfrac{5}{3}\) thì:
\(3x-5+2x+3=7\)
\(\Rightarrow5x=9\)
\(\Rightarrow x=\dfrac{9}{5}\) ( t/m )
+) Nếu \(-\dfrac{3}{2}\le x< \dfrac{5}{3}\) thì:
\(5-3x+2x+3=7\)
\(\Rightarrow8-x=7\)
\(\Rightarrow x=1\) ( t/m )
+) Nếu \(x< \dfrac{-3}{2}\) thì:
\(5-3x-2x-3=7\)
\(\Rightarrow2-5x=7\)
\(\Rightarrow x=-1\) ( loại )
Vậy \(x=\dfrac{9}{5}\) hoặc x = 1