9/14-x/7:5/3=6/14

x/7:5/3=3/14

x/7=5/14

x=35/7

X = 35 thôi

Ta có: \(\frac{3}{7}.\left|3x-2\right|=\frac{9}{14}\)

\(\Rightarrow\left|3x-2\right|=\frac{9}{14}:\frac{3}{7}=\frac{3}{2}\)

\(\Rightarrow\orbr{\begin{cases}3x-2=\frac{3}{2}\\3x-2=\frac{-3}{2}\end{cases}\Rightarrow\orbr{\begin{cases}3x=\frac{7}{2}\\3x=\frac{1}{2}\end{cases}\Rightarrow}\orbr{\begin{cases}x=\frac{7}{6}\\x=\frac{1}{6}\end{cases}}}\)

Vậy x = 7/6 hoặc x = 1/6

3/7.(3.x-2)=9/14 và = -9/14

3x-2= 9/14:3/7=3/2

x= (3/2+2) :3=7/6

với 3/7(3x-2)=-9/7

3x-2=-9/7 : 3/7=-3

x=(-3+2):3=-1/3

vậy x có hai giá trị 7/6 và -1/3

2.(x-5)-3.(x+7)=14

-> 2x-10-3x-21=14

->-x-31=14

->-x=45

->x=-45

x=-45 nhé

là 45 nhé bạn

9/5 : 7/4 + 3/4 x 8/7       

= (9/5 : 8/7) x (7/4 + 3/4)

= 63/40 x 5/2

= 63/16

7 x 3/14 - 1/14

= 3/2 - 1/4

= 5/4

_{^{\(\dfrac{9}{5}:\dfrac{7}{4}+\dfrac{3}{4}\times\dfrac{8}{7}\)}}

_{^{\(=\dfrac{9}{5}\times\dfrac{4}{7}+\dfrac{3}{4}\times\dfrac{8}{7}\)}}

_{^{\(=\dfrac{36}{35}+\dfrac{6}{7}\)}}

_{^{\(=\dfrac{66}{35}\)}}

_{^{\(7\times\dfrac{3}{14}-\dfrac{1}{14}\)}}

_{^{\(=\dfrac{3}{2}-\dfrac{1}{14}\)}}

_{^{\(=\dfrac{10}{7}\)}}

x/7=2/7

x=2

x/7 * 3/5 =3/7

x/7         =3/7:3/5

x/7          =5/7

x=5

x/7=5/7

x=5

sorry minh nham 

4/5 x 15/11 x 2/9 = 8/33

4/7 x 2/5 + 4/7 x 3/5 = 4/7

( 5/7 + 7/8 ) x 2 =  89/28

2/14 + 3/7 - 3/14 x 2 = 1/7 

tk mình nhé, mk nhanh nhất

4/5 x 15/11 x2/9

= 4x15x2/5x11x9

= 4x5x3x2/5x11x3x3

= 8/33

4/7x2/6+4/7x3/5

=4/7x(2/6+3/5)

=4/7x 14/15

=8/15

2.(x - 5) - 3.(x + 7) = 14

=> 2x - 10 - 3x - 21 = 14

=> -x = 14 + 21 + 10

=> -x = 45

=> x = -45

a = 302 / 105

b = 98/9

c= 6/5

tick nha

a=302/105

b 98 /9

c6/5

k nha và học tốt

                   Đề Bài :\(\frac{9}{14}\)- \(\frac{x}{7}\): \(\frac{5}{3}\)= \(\frac{3}{14}\)

ta có : \(\frac{9}{14}\)- \(\frac{x}{7}\)= \(\frac{3}{14}\)x \(\frac{5}{3}\)= \(\frac{5}{14}\)

          \(\frac{x}{7}\)= \(\frac{9}{14}\)- \(\frac{5}{14}\)= \(\frac{4}{14}\)

         \(\frac{4}{14}\)= \(\frac{x}{7}\)=> \(\frac{4}{14}\)= \(\frac{2}{7}\)=> x = 2