Question

Tìm x :

a) \(\dfrac{2}{9}\) + x = 1            b)\(\dfrac{6}{7}\) - x = \(\dfrac{2}{3}\)            c)x - \(\dfrac{1}{2}\)= \(\dfrac{1}{4}\)

Answer 1

a: x=1-2/9=7/9

b: x=6/7-2/3=18/21-14/21=4/21

c: x=1/4+1/2=3/4

Answer 2

a) \(\dfrac{2}{9}+x=1\)

\(x=1-\dfrac{2}{9}\)

\(x=\dfrac{9}{9}-\dfrac{2}{9}=\dfrac{7}{9}\)

b) \(\dfrac{6}{7}-x=\dfrac{2}{3}\)

\(x=\dfrac{6}{7}-\dfrac{2}{3}\)

\(x=\dfrac{4}{21}\)

c) \(x-\dfrac{1}{2}=\dfrac{1}{4}\)

\(x=\dfrac{1}{4}+\dfrac{1}{2}\)

\(x=\dfrac{3}{4}\)

Answer 3

a)\(x=1-\dfrac{2}{9}=\dfrac{9}{9}-\dfrac{2}{9}=\dfrac{7}{9}\)

b)\(x=\dfrac{6}{7}-\dfrac{2}{3}=\dfrac{18}{21}-\dfrac{14}{21}=\dfrac{4}{21}\)

c)\(x=\dfrac{1}{4}+\dfrac{1}{2}=\dfrac{1}{4}+\dfrac{2}{4}=\dfrac{3}{4}\)

Answer 4

`a)2/9+x=1`

`x=1-2/9`

`x=7/9`

`b)6/7-x=2/3`

`x=6/7-2/3`

`x=4/21`

`c)x-1/2=1/4`

`x=1/4+1/2`

`x=3/4`

Answer 5

a,x=1-2/9

x=7/9

b,x=6/7-2/3

x=4/21

c,x=1/4+1/2

x=1/4+2/4

x=3/4

Answer 6

a) => x = 1 - 2/9

=> x = 7/9

b) => x = 6/7 - 2/3

=> x = 4/21

c) => x = 1/4 + 1/2

=> x = 3/4

Answer 7

a. x = 1 - 2/9

    x =7/9

b. x = 6/7 - 2/3   

    x  = 4/21

c. x = 1/4 + 1/2

    x = 3/4