Question

  Giúp

Answer 1

`a, 5/9-4/9x=8/9`

`4/9x = -3/9`

`x = -3/4`

`b, 11/10x -1/3=2/5`

`11/10x = 11/15`

`x = 11/15 :11/10`

`x = 22/31`

`c, 7/20 + 5/20 : x = 3/4`

`5/20 : x = 8/20`

`x = 5/20 : 8/20`

`x = 5/8`

Answer 2

a: =>5-4x=8

=>4x=-3

=>x=-3/4

b; \(\Leftrightarrow x\cdot\dfrac{11}{10}=\dfrac{2}{5}+\dfrac{1}{3}=\dfrac{6+5}{15}=\dfrac{11}{15}\)

=>\(x=\dfrac{11}{15}:\dfrac{11}{10}=\dfrac{2}{3}\)

c: \(\Leftrightarrow\dfrac{1}{4}:x=\dfrac{3}{4}-\dfrac{7}{20}=\dfrac{15-7}{20}=\dfrac{8}{20}=\dfrac{2}{5}\)

=>\(x=\dfrac{1}{4}:\dfrac{2}{5}=\dfrac{1}{4}\cdot\dfrac{5}{2}=\dfrac{5}{8}\)

d: \(\Leftrightarrow x\cdot\dfrac{1}{2}+\dfrac{1}{2}=\dfrac{-5}{3}\cdot\dfrac{-6}{25}=\dfrac{30}{75}=\dfrac{2}{5}\)

=>x*1/2=2/5-1/2=4/10-5/10=-1/10

=>x=-1/10:1/2=-1/5

e: =>5/7:x=-33/35

=>x=-25/33

f: =>-3x=4/5

=>x=-4/15

g: =>-1/6x=-3/4-1/5=-15/20-4/20=-19/20

=>x=19/20*6=19*3/10=57/10