(x+4)/5 -x+4 =x/3 –(x-2)/2 (5x+2)/6 -(8x-1)/3 =(4x+2)/5 -5 giúp mk làm nha

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1. Đáp án:

   $\begin{array}{l}
   \frac{{x + 4}}{5} – x + 4 = \frac{x}{3} – \frac{{x – 2}}{2}\\
    \Rightarrow \frac{{6\left( {x + 4} \right) + 30\left( { – x + 4} \right)}}{{30}} = \frac{{10x – 15\left( {x – 2} \right)}}{{30}}\\
    \Rightarrow 6x + 24 – 30x + 120 = 10x – 15x + 30\\
    \Rightarrow 19x = 114\\
    \Rightarrow x = 6\\
   Vậy\,x = 6\\
   \frac{{5x + 2}}{6} – \frac{{8x – 1}}{3} = \frac{{4x + 2}}{5} – 5\\
    \Rightarrow \frac{{5\left( {5x + 2} \right) – 10\left( {8x – 1} \right)}}{{30}} = \frac{{6\left( {4x + 2} \right) – 5.30}}{{30}}\\
    \Rightarrow 25x + 10 – 80x + 10 = 24x + 12 – 150\\
    \Rightarrow 79x = 158\\
    \Rightarrow x = 2\\
   Vậy\,x = 2
   \end{array}$

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