
a)
3...">
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời. a: \(x< -9:\dfrac{3}{2}=-9\cdot\dfrac{2}{3}=-6\) b: 2/3x>-2 hay x>-2:2/3=-3 c: \(2x>\dfrac{9}{5}-\dfrac{4}{5}=1\) hay x>1/2 d: \(\Leftrightarrow x\cdot\dfrac{3}{5}>6-4=2\) hay x>2:3/5=2x5/3=10/3 a: \(x>3:\dfrac{1}{2}=6\) b: \(x>-2:\left(-\dfrac{1}{3}\right)=6\) c: \(x>-4:\dfrac{2}{3}=-6\) d: \(x< -6:\dfrac{3}{5}=-10\) c) \(\left|2x-3\right|=4\) \(\Leftrightarrow\orbr{\begin{cases}2x-3=4\\2x-3=-4\end{cases}}\) \(TH:2x-3=4\) \(\Leftrightarrow2x=4+3\) \(\Leftrightarrow2x=7\) \(\Leftrightarrow x=\frac{7}{2}\) \(TH:2x-3=-4\) \(\Leftrightarrow2x=-4+3\) \(\Leftrightarrow2x=-1\) \(\Leftrightarrow x=\frac{-1}{2}\) Vậy \(x\in\left\{\frac{7}{2};\frac{-1}{2}\right\}\) e) \(\frac{x-1}{x-3}>1\) \(ĐKXĐ:x\ne3\) \(\Leftrightarrow\frac{x-3+2}{x-3}>1\) \(\Leftrightarrow\frac{x-3}{x-3}+\frac{2}{x-3}>1\) \(\Leftrightarrow1+\frac{2}{x-3}>1\) \(\Leftrightarrow\frac{2}{x-3}>0\) \(\Leftrightarrow x-3>0\) \(\Leftrightarrow x>3\) a, x+2/5 >=0 <=> x+2 >=0 <=> x>=-2 b. x+2/x-3 <0 <=> 1+5/x-3 <0 <=> 5/x-3 <-1 <=> x-3> -5 <=> x>-2 c. x-1/x-3 >1 <=> 1+ 2/x-3 >1 <=> 2/x-3 >0 <=> x-3 >0 <=> x>3 \(\frac{25x-655}{95}-\frac{5\left(x-12\right)}{209}=\frac{89-3x-\frac{2\left(x-18\right)}{5}}{11}\) \(< =>\frac{5x-131}{19}=\frac{1631-52x-\frac{38x-684}{5}}{209}\) \(< =>\left(5x-131\right)209=\left(1631-52x-\frac{38x-684}{5}\right)19\) \(< =>55x-1441=1631-52x-\frac{38x-684}{5}\) \(< =>3072-107x=\frac{38x-684}{5}\) \(< =>\left(3072-107x\right)5=38x-684\) \(< =>15360-535x-38x-684=0\) \(< =>14676=573x< =>x=\frac{14676}{573}=\frac{4892}{191}\) nghệm xấu thế \(\frac{8\left(x+22\right)}{45}-\frac{7x+149+\frac{6\left(x+12\right)}{5}}{9}=\frac{x+35+\frac{2\left(x+50\right)}{9}}{5}\) \(< =>\frac{8x+176}{45}-\frac{41x+817}{45}=\frac{11x+415}{45}\) \(< =>993-33x-11x-415=0\) \(< =>578=44x< =>x=\frac{289}{22}\)
