Question

|1/2-2x|+2/3=7/3

giúp mình với !!11!

 

Answer 1

<=>\(\left|\dfrac{1}{2}-2x\right|=\dfrac{5}{3}< =>\left[{}\begin{matrix}\dfrac{1}{2}-2x=\dfrac{5}{3}\\\dfrac{1}{2}-2x=\dfrac{-5}{3}\end{matrix}\right.< =>\left[{}\begin{matrix}2x=\dfrac{-7}{6}\\2x=\dfrac{13}{6}\end{matrix}\right.< =>\left[{}\begin{matrix}x=\dfrac{-7}{12}\\x=\dfrac{13}{12}\end{matrix}\right.\)

Answer 2

\(\left|\dfrac{1}{2}+2x\right|+\dfrac{2}{3}=\dfrac{7}{3}\)

\(\left|\dfrac{1}{2}+2x\right|=\dfrac{7}{3}-\dfrac{2}{3}=\dfrac{5}{3}\)

⇔\(\left[{}\begin{matrix}\dfrac{1}{2}+2x=\dfrac{5}{3}\\\dfrac{1}{2}+2x=-\dfrac{5}{3}\end{matrix}\right.\)

⇔ \(\left[{}\begin{matrix}x=\dfrac{7}{12}\\x=-\dfrac{13}{12}\end{matrix}\right.\)

Vậy ...

Answer 3

⎡⎢ ⎢⎣x=712x=−1312[x=712x=−1312

Vậy ...

Answer 4

cảm ơn nha!!!!!

 

Answer 5

đúng rùi !Ha Hoang -7 ko phải 7 nha

 

Answer 6

l1/2-2x l =7/3-2/3

l 1/2-2x l =5/3

vậy 1/2-2x=5/3 hoặc 1/2-2x=-5/3

      2x=1/2-5/3           2x=1/2-(-5/3)

      2x=-7/6                2x=13/6

      x=-7/3:2               x = 13/6:2

      x=-7/6                  x=13/12

vậy x=-7/6 hoặc x=13/12