Toán Lớp 7: Tìm x biết: ( 2x – 3 ) – ( x – 5 ) = ( x + 2 ) – ( x – 1 )
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Toán Lớp 7: Tìm x biết: ( 2x – 3 ) – ( x – 5 ) = ( x + 2 ) – ( x – 1 )
Comments ( 2 )
$\Leftrightarrow 2x-3-x+5=x+2-x+1$
$\Leftrightarrow x+2=3$
$\Leftrightarrow x=1$
Vậy $x=1$