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

Toán Lớp 6: tìm y 15y – 133=17 14y+54=82 17y-20=14 nhanh nha

Toán Lớp 6: tìm y
15y – 133=17
14y+54=82
17y-20=14
nhanh nha

Comments ( 2 )

  1.       15y – 133 = 17
    => 15y     = 17 + 133
    => 15y     = 150
    =>     y     = 150 : 15
    =>     y     = 10
          14y + 54 = 82
    => 14y          = 82 – 54
    => 14y          = 28
    =>     y          = 28 : 14
    =>     y          = 2
          17y – 20 = 14
    => 17y         = 14 + 20
    => 17y         = 34
    =>     y         = 34 : 17
    =>     y         = 2
     
      

  2. $a,$
    $15y-133=17$
    $⇔15y=17+133$
    $⇔15y=150$
    $⇔y=10$
    Vậy $y=10$
    $b,$
    $14y+54=82$
    $⇔14y=82-54$
    $⇔14y=28$
    $⇔y=2$
    Vậy $y=2$
    $c,$
    $17y-20=14$
    $⇔17y=14+20$
    $⇔17y=34$
    $⇔y=2$
    Vậy $y=2$
    Xin hay nhất cho nhóm ạ

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