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
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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
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