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

Toán Lớp 6: Bài 4 : Tìm x ∈ Z a) 3x – ( -17 ) = 14 b) ( x + 9 ) . ( x – 2 ) = 10 c) ( x + 5 ) . ( x – 7 ) = 0 d) 12 + 2x = 3( x – 7 ) e) 2x² – 1 =

Toán Lớp 6: Bài 4 : Tìm x ∈ Z
a) 3x – ( -17 ) = 14
b) ( x + 9 ) . ( x – 2 ) = 10
c) ( x + 5 ) . ( x – 7 ) = 0
d) 12 + 2x = 3( x – 7 )
e) 2x² – 1 = 49

Comments ( 1 )

  1. a) 3x = 14 +(-17)
    3x = -3
    x = (-3):3
    x= -1
    Không có thời gian bận rồi nên làm giúp em 1 câu
    Nhớ cho 5 sao nha

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