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

Toán Lớp 6: Tìm X biết : Bài này dễ `A) 5 – (10-x) = 7 ` `B) -32-(x-5)=0` `C) 11+(15-x)=1` `D) -12+(x-9)=0`

Toán Lớp 6: Tìm X biết :
Bài này dễ
A) 5 – (10-x) = 7
B) -32-(x-5)=0
C) 11+(15-x)=1
D) -12+(x-9)=0

Comments ( 1 )

  1. $#QLinkVN$
    TA CÓ:
    a) 5-(10-x)=7
    ⇔5-10+x=7
    ⇔-5+x=7
    ⇔x=7+5
    ⇔x=12
    Vậy x=12
    b) -32-(x-5)=0
    ⇔-32-x+5=0
    ⇔-27-x=0
    ⇔x=-27
    Vậy x=-27
    c) 11+(15-x)=1
    ⇔11+15-x=1
    ⇔16-x=1
    ⇔x=16-1
    ⇔x=15
    Vậy x=15
    d) -12+(x-9)=0
    ⇔-12+x-9=0
    ⇔-21+x=0
    ⇔x=0-(-21)
    ⇔x=0+21
    ⇔x=21
    Vậy x=21

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

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