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

Toán Lớp 6: ( 14/5 – x ) . 15/3 = 3/2 2 phút , tìm x

Toán Lớp 6: ( 14/5 – x ) . 15/3 = 3/2
2 phút , tìm x

Comments ( 2 )

  1. $( \frac{14}{5} – x ) . \frac{15}{3} = \frac{3}{2}$
    $⇒ \frac{14}{5} – x =\frac{3}{2}:\frac{15}{3}$
    $⇒\frac{14}{5} – x = \frac{3}{10}$
    $⇒x =\frac{14}{5} – \frac{3}{10}$
    $⇒x = \frac{5}{2}$
     

  2. ( 14/5 – x ) . 15/3 = 3/2
    =>14/5-x=3/2 ÷ 15/3
    =>28/10-x=3/2×3/15
    =>28/10-x=9/30
    =>28/10-x=3/10
    =>x=28/10=3/10
    =>x=25/10
    =>x=5/2
     

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