Question

\(\left|x-0,5\right|\)=\(\dfrac{7}{2}\)

\(x:\dfrac{3}{8}+\dfrac{5}{8}=x\)

\(\dfrac{5}{6}-\left|x-\dfrac{1}{2}\right|\)=\(\dfrac{15}{18}\)

\(\dfrac{-7}{12}\)-\(\dfrac{2}{3}\):x=\(\dfrac{-5}{8}\)

\(\left(5x-3\right)^2-\dfrac{1}{64}=0\)

9.27\(\le\)\(3^x\) \(\le\)243

\((x-\dfrac{1}{2})^3\) =8

\(\dfrac{x-3}{5-x}=\dfrac{5}{7}\)

Answer 1

a: |x-1/2|=7/2

=>x-1/2=7/2 hoặc x-1/2=-7/2

=>x=4 hoặc x=-3

b: \(x:\dfrac{3}{8}+\dfrac{5}{8}=x\)

=>8/3x-x=-5/8

=>5/3x=-5/8

hay x=-5/8:5/3=-5/8x3/5=-15/40=-3/8

c: \(\dfrac{5}{6}-\left|x-\dfrac{1}{2}\right|=\dfrac{15}{18}=\dfrac{5}{6}\)

=>|x-1/2|=0

=>x-1/2=0

hay x=1/2

e: \(\left(5x-3\right)^2-\dfrac{1}{64}=0\)

=>(5x-3)²=1/64

=>5x-3=1/8 hoặc 5x-3=-1/8

=>5x=25/8 hoặc 5x=23/8

=>x=5/8 hoặc x=23/40