=>x-3/4=2

hay x=11/4

\(x-\dfrac{3}{4}=2\)

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

\(x=\dfrac{11}{4}\)

x - 3/4 = 8/5 x 5/4

x - 3/4 =  2

       x  = 2 + 3/4

       x  = 11/4

vậy x =...

⇒ \(x=\dfrac{23}{5}:\dfrac{8}{11}\)

⇒ \(x=\dfrac{253}{40}\)

9 x 5 + 1234 - 12 x 8

= 45 + 1234 - 96

= 1279 - 96

= 1183

9 x 5 + 1234 - 12 x 8 

= 45 + 1234 - 96

=   1279 - 96 

= 1183                 k mk nha~~

9 x 5 + 1234 - 12 x 8 

= 45 + 1234 - 96

= 1279 - 96

= 1183

Bài 1: 

a: x/-2=-18/x

=>x²=36

=>x=6 hoặc x=-6

b: x/2+x/5=17/10

=>7/10x=17/10

hay x=17/7

a, \(x + 1/6 = -3/8 \)

\(x = -3/8 - 1/6\)

\(x = -13/24\)

Vậy \(x = -13/24\)

b, \(-3/7 - x = 4/5 - 2/3\)

\(-3/7 - x = 2/15\)

\(x = -3/7 - 2/15\)

\(x = -59/105.\)

Vậy \(x = -59/105\)

x+1/6=-3/8

x=-3/8-1/6

x=-13/24

-3/7-x=4/5+-2/3
-3/7-x=2/15

x=-3/7-2/15

x=-59/105

tham khảo

`x xx 6/7=5/14`

`=>x=5/14:6/7`

`=>x=5/14xx7/6`

`=>x=35/84`

`=>x=5/12`

Vậy `x=5/12`

__

`x:2/3=4/9`

`=>x=4/9xx2/3`

`=>x=8/27`

Vậy `x=8/27`

__

`x-1/4=3/2`

`=>x=3/2+1/4`

`=>x=6/4+1/4`

`=>x=7/4`

Vậy `x=7/4`

__

`x+4/5=8/9`

`=>x=8/9-4/5`

`=>x=40/45-36/45`

`=>x=4/45`

Vậy `x=4/45`

\(x\cdot\dfrac{6}{7}=\dfrac{5}{14}\)

\(x\)         \(=\dfrac{5}{14}:\dfrac{6}{7}\)

\(x\)           \(=\dfrac{5}{12}\)

\(x:\dfrac{2}{3}=\dfrac{4}{9}\)

\(x\)        \(=\dfrac{4}{9}\cdot\dfrac{2}{3}\)

\(x\)          \(=\dfrac{8}{27}\)

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

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

\(x\)            \(=\dfrac{7}{4}\)

\(x+\dfrac{4}{5}=\dfrac{8}{9}\)

\(x\)          \(=\dfrac{8}{9}-\dfrac{4}{5}\)

\(x\)            \(=\dfrac{4}{45}\)

\(x:2\times5+1234=2234\)

\(x:2\times5=2234-1234\)

\(x:2\times5=1000\)

\(x:2=1000:5\)

\(x:2=200\)

\(x=200\times2\)

\(x=400\)

@muối

x=400

x : 2 x 5 + 1.234 = 2.234

               x : 2 x 5 = 2.234 - 1.234

               x : 2 x 5 = 1.000

                       x : 2 = 1.000 : 5

                       x : 2 = 200

                             x = 200 x 2

                             x = 400

Chúc bạn học tốt.

😁😁😁

12340

(1234x5)+(1234x5)=6170+6170=12340

( 1234 x 5 ) + ( 1234 x 5 )

= 6170  + 6170

= 12340

Ta có: 45+(1234+x)=45+1234+x=1234+(45+x)

Theo đề bài ta có: 45+(1234+x)=1234+(45+120)

Nên: 1234+(45+x)=1234+(45+120)

Từ đó suy ra x = 120.

Đáp án A