Toán Lớp 7: Tìm x
a) 0,5x= 1/5 – 1
b) ( x – 1 )² = 1/9
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Toán Lớp 7: Tìm x
a) 0,5x= 1/5 – 1
b) ( x – 1 )² = 1/9
Comments ( 2 )
a, 0,5 x = 1/5 -10,5 x= -4 / 51/2 x =-4/5x= -4/5 :1 /2x= -4/5 x 2x= -8/5 b, ( x- 1) mũ 2 = 1/9TH1 x-1 = 1/3 x=1/3+1=4/3TH2 x-1 = -1/3x=-1/3+1=2/3vậy x=4/3 hoặc 2/3