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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: 4/3-2x= 2/5+3x Mik sẽ vote 5* cho CTLHN nha

Toán Lớp 7: 4/3-2x= 2/5+3x
Mik sẽ vote 5* cho CTLHN nha

Comments ( 2 )

  1. 4/3 – 2x = 2/5 + 3x
    $\Leftrightarrow$ -2x – 3x = 4/3 – 2/5
    $\Leftrightarrow$ -5x = 14/15
    $\Leftrightarrow$ x = 14/15 : (-5)
    $\Leftrightarrow$ x = 14/15 . (-1)/5
    $\Leftrightarrow$ x = -14/75
    $\text{Vậy}$ x = -14/75
     

  2. $\frac{4}{3}$ -\text{2x} = $\frac{2}{5}$ +\text{3x}
     -\text{2x} + \text{3x}  = $\frac{2}{5}$  – $\frac{4}{3}$  
     1x =  $\frac{6}{15}$ – $\frac{20}{15}$ 
    1x = $\frac{-14}{15}$ 
    x = $\frac{-14}{15}$  : 1 
    x = $\frac{-14}{15}$ 
    Vậy x = $\frac{-14}{15}$  

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222-9+11+12:2*14+14 = ? ( )