\(\dfrac{x}{2}+\dfrac{3x}{5}-\dfrac{6}{5}=3\Leftrightarrow\dfrac{11x}{10}=3+\dfrac{6}{5}=\dfrac{21}{5}\)
\(\Rightarrow11x=42\Leftrightarrow x=\dfrac{42}{11}\)
\(\frac{1}{2}\)x + \(\frac{3}{5}\)( x - 2 ) = 3
\(\frac{1}{2}\)x + \(\frac{3}{5}\) x - \(\frac{3}{5}\). 2 = 3
x \((\)\(\frac{1}{2}\)+ \(\frac{3}{5}\) \()\)- \(\frac{6}{5}\) = 3
x . \(\frac{11}{10}\) - \(\frac{6}{5}\) = 3
x . \(\frac{11}{10}\) = 3 + \(\frac{6}{5}\) = \(\frac{21}{5}\)
x = \(\frac{21}{5}\) : \(\frac{11}{10}\) = \(\frac{42}{11}\)
NẾU CÓ GÌ SAI SÓT MONG BẠN THÔNG CẢM
1/2 . x + 3/5 . ( x - 2 ) = 3 x + 3/5 . ( x - 2 ) = 3 : 1/2 x + 3/5 . ( x - 2 ) = 6 x . ( x - 2 ) = 6 - 3/5 x . ( x - 2 ) = 27/5 x . x + x - 2 = 27/5 x mũ x + x - 2 = 27/5 2 . x mũ x - 2 = 27/5 x mũ x - 2 = 27/5 : 2 x mũ x - 2 = 27/10 x mũ x = 27/10 + 2 x mũ x = 47/10 x . x = 47/10 x . x = 4,7 x . x = căn 4,7 x = căn 4,7 : x Vậy x = căn 4,7 : x hoặc là 47/10 : x