Question

tìm x

\(\left|2x-\frac{1}{3}\right|+\frac{5}{6}=1\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

giúp mk nha , ngày mai cô mk kiểm tra mấy câu này , không có là mk "xơi" trứng ngỗng đấy

Answer 1

2x-\(\frac{1}{3}\)=1-\(\frac{5}{6}\)
2x-\(\frac{1}{3}\)=\(\frac{1}{6}\)
2x=\(\frac{1}{6}\)+\(\frac{1}{3}\)
2x=1/6 +2/6
2x=\(\frac{1}{2}\)
x=1/2 : 2
x/\(\frac{1}{4}\)

Answer 2

\(\frac{7}{9}\):(2+\(\frac{3}{4}\)x)+\(\frac{5}{9}\)=\(\frac{23}{27}\)
7/9 :(2+3/4x)=\(\frac{23}{27}\)-\(\frac{5}{9}\)
7/9 :(2+3/4x)=\(\frac{23}{27}\)-\(\frac{15}{27}\)
7/9 :(2+3/4x)=\(\frac{8}{27}\)
(2+3/4x)      =\(\frac{7}{9}\) . \(\frac{27}{8}\)
(2+3/4x)   =\(\frac{21}{8}\)
\(\frac{3}{4}\)x            =\(\frac{21}{8}\)-2
3/4x          =21/8 -16/8
3/4x          = 5/8
    x           =\(\frac{5}{8}\) : \(\frac{3}{4}\)   
    x           =5/8 . 4/3
    x           =\(\frac{20}{24}\)
 

Answer 3

2x - 1/3 = -1/6
2x         =-1/6+1/3
2x         =-1/6+2/6
2x         =-1/6
 x          =-1/6 :2
x=-1/12