Question

[Đào Minh Nghĩa]

a) 2/3 + 1/3 : x= 3/5

b) ( 2x/3 - 3 ) : (-10) = 2/5

c) | 2x + 1 | = 4

d) | 2x - 1 | +1 = 4

e ) 8 - | 1 - 3x | = 1/81

f) 1,5 x - 7/3 * x = 1,5 - 2/3

g) (1/2)^2x-1 = 1/8

h) ( -1/3 )^x-3 = 1/81

Answer 1

[Nguyễn Lê Phước Thịnh]

a: =>1/3:x=3/5-2/3=9/15-10/15=-1/15

=>x=-1/3:1/15=5

b: \(\Leftrightarrow x\cdot\dfrac{2}{3}-3=\dfrac{2}{5}\cdot\left(-10\right)=-4\)

=>x*2/3=-1

=>x=-3/2

c: =>2x+1=4 hoặc 2x+1=-4

=>x=3/2 hoặc x=-5/2

h: =>x-3=4

=>x=7

g: =>2x-1=3

=>2x=4

=>x=2

f: \(\Leftrightarrow x\cdot\left(\dfrac{3}{2}-\dfrac{7}{3}\right)=\dfrac{3}{2}-\dfrac{2}{3}\)

=>x*-5/6=5/6

=>x=-1

d: =>|2x-1|=3

=>2x-1=3 hoặc 2x-1=-3

=>x=-1 hoặc x=2