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

Toán Lớp 7: (1/2+1,5).x=1/5 3/2-x-2/5=1/3x-1/4

Toán Lớp 7: (1/2+1,5).x=1/5
3/2-x-2/5=1/3x-1/4

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    $(\dfrac{1}{2}+1,5).x=\dfrac{1}{5}$
    $⇒2x=\dfrac{1}{5}$
    $⇒x=\dfrac{1}{10}$
    Vậy S={\frac{1}{10}}
    ————————–
    $\dfrac{3}{2}-x-\dfrac{2}{5}=\dfrac{1}{3}x-\dfrac{1}{4}$
    $⇒-x-\dfrac{1}{3}x=\dfrac{-3}{2}+\dfrac{2}{5}-\dfrac{1}{4}$
    $⇒\dfrac{-4}{3}x=\dfrac{-27}{20}$
    $⇒x=\dfrac{81}{80}$
    Vậy S={\frac{81}{80}}
     

  2. Lời giải và giải thích chi tiết:
    ( $\dfrac{1}{2}$ + 1,5 ) . x = $\dfrac{1}{5}$
    2x = $\dfrac{1}{5}$
    x = $\dfrac{1}{5}$ : 2
    x = $\dfrac{1}{10}$
    Vậy x = $\dfrac{1}{10}$
    $\dfrac{3}{2}$ – x – $\dfrac{2}{5}$ = $\dfrac{1}{3}$ x – $\dfrac{1}{4}$
    $\dfrac{11}{10}$ – x = $\dfrac{1}{3}$ x – $\dfrac{1}{4}$
    -x – $\dfrac{1}{3}$ x = – $\dfrac{1}{4}$ – $\dfrac{11}{10}$
    – $\dfrac{4}{3}$ x = – $\dfrac{27}{20}$
    x = $\dfrac{27}{20}$ : $\dfrac{4}{3}$
    x = $\dfrac{81}{80}$
    Vậy x = $\dfrac{81}{80}$
    CHÚC BẠN HỌC TỐT!!

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

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