Bài 1 : Tìm x
a, 2/3 – x + 5/4 = 7/12
b, ( 4/5 – x + 1/2 ) – 3/4 = 5/6
c, 4/3 -7/12 + x = 4/3
d, giá trị tuyệt đối của 3x + 3/5 đóng giá trị tuyệt đối – 1/2 = 2/5
e, ( 3/2 – x ) mũ 2 = 4/25
f, ( 1/2 . x – 3 ) . ( 5x – 1/4 ) =0
HELPPPPPP MEEEEE
Bài 1:
a) 2/3 – x + 5/4 = 7/12
2/3 – x = 7/12 – 5/4
2/3 – x = 2/3
x = 2/3 – 2/3
x = 0
b) (4/5 – x + 1/2) – 3/4 = 5/6
(4/5 – x + 1/2) = 5/6 + 3/4
(4/5 – x + 1/2) = 19/12
4/5 – x = 19/12 – 1/2
4/5 – x = 13/12
x = 4/5 – 13/12
x = 17/60
c) 4/3 – 7/12 + x = 4/3
7/12 + x = 4/3 – 4/3
7/12 + x = 0
x = 0 – 7/12
x = 7/12
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