\(a)x+\frac{2}{3}=\frac{5}{6}\)

\(x=\frac{5}{6}-\frac{2}{3}\)

\(x=\frac{5}{6}-\frac{4}{6}=\frac{1}{6}\)

\(b)x-\frac{3}{5}=\frac{2}{7}+\frac{1}{5}\)

\(x=\frac{3}{5}-\frac{17}{35}\)

\(x=\frac{21}{35}-\frac{17}{35}\)

\(x=\frac{4}{35}\)

\(c)x\div\frac{9}{11}=\frac{5}{22}\)

\(x=\frac{5}{22}\times\frac{9}{11}\)

\(x=\frac{45}{242}\)

\(d)\frac{3}{5}\times x=\frac{3}{10}\)

\(x=\frac{3}{10}\div\frac{3}{5}\)

\(x=\frac{1}{2}\)

\(a)\)\(x+\frac{2}{3}=\frac{5}{6}\)

\(x=\frac{5}{6}-\frac{2}{3}\)

\(x=\frac{1}{6}\)

\(b)\)\(x-\frac{3}{5}=\frac{2}{7}+\frac{1}{5}\)

\(x-\frac{3}{5}=\frac{17}{35}\)

\(x=\frac{17}{35}+\frac{3}{5}\)

\(x=\frac{38}{35}\)

\(c)\)\(x\div\frac{9}{11}=\frac{5}{22}\)

\(x=\frac{5}{22}\times\frac{9}{11}\)

\(x=\frac{45}{242}\)

\(d)\)\(\frac{3}{5}\times x=\frac{3}{10}\)

\(x=\frac{3}{10}\div\frac{3}{5}\)

\(x=\frac{3}{10}\times\frac{5}{3}\)

\(x=\frac{1}{2}\)

\(\dfrac{37\cdot5^4}{25^2}=\dfrac{37\cdot5^4}{5^4}=37\\ \dfrac{2^4\cdot2^6\cdot3^8\cdot9^2}{4^4\cdot3^{11}}=\dfrac{2^{10}\cdot3^8\cdot3^4}{2^8\cdot3^{11}}=2^2\cdot3=12\\ \dfrac{3\cdot9^4\cdot9^3}{3^2\cdot9}=\dfrac{3\cdot3^8\cdot3^6}{3^2\cdot3^2}=3^{11}\\ \dfrac{125\cdot5\cdot64-25^3\cdot10\cdot4}{5^7\cdot8}=\dfrac{5^3\cdot5\cdot2^6-5^6\cdot2\cdot5\cdot2^2}{5^7\cdot2^3}=\dfrac{5^4\cdot2^3\left(2^3-5^3\right)}{5^7\cdot2^3}=\dfrac{8-125}{5^3}=\dfrac{-117}{125}\)

Mọi người giúp em với em đang cần gấp!!

Câu 1:

\(a,=43\cdot\left(27+93\right)+3111+3363=43\cdot120+6474=11634\\ b,=11^2+2^{15}\cdot2^3:2^{17}=121+2=123\\ c,=11^2+7^2-9=121+49-9=151\)

Câu 2:

\(a,\Rightarrow x-\dfrac{3}{2}=5^2=25\\ \Rightarrow x=25+\dfrac{3}{2}=\dfrac{53}{2}\\ b,\Rightarrow7x=30-2=28\\ \Rightarrow x=4\)

1. 

a) 22 - ( - x ) = 12

22 + x = 12

x = 12 - 22

x = -10

b) ( x + 5 ) + ( x - 9 ) = x+ 2

( x + 5 ) + x - 9 = x + 2

x + 5 - 9 = 2 

x - 4 = 2 

x = 6

2.

| x - 20 | = 11

Th1: x- 20 = 11 

         x    = 20 + 11 = 31

Th2 : x- 20 = -11

         x     = -11 + 20

         x      = 9

b) x ko có giá trị thoả mãn 

B4

a)x=10

b)x=3

c)x=11

d)x=8

1.

a. 

11 + x : 5 = 13 

x : 5 = 13 - 11

x : 5 = 2

x      = 2 . 5

x      = 10

Bài 4: Tìm x, biết:
a) 11 + x : 5 = 13   

            x : 5 = 2

                 x = 10

b) 15 + (7 – x) = 19

               7 - x = 4

                    x = 3
c) 12 + 3.(x – 5) = 30   

           3 ( x - 5 ) = 18

                  x - 5 = 6

                       x = 11

 d) 17 + (x + 4) : 3 = 21

           ( x + 4 ) : 3 = 4

                    x + 4 = 12

                          x = 8

Bài 2:

a: 2/6x5/3=10/18=5/9

b: 11/9x5/10=55/90=11/18

c: 3/9x6/8=1/3x3/4=1/4

d: 4/9x12/16=48/144=1/3

e: 25/15x6/7=5/3x6/7=30/21=10/7

f: 6/10x15/20=90/200=9/20

Bài 1

4/5 x 6/7= 24/35

2/9 x 1/2= 2/18= 1/9

1/2 x 8/3= 8/6= 4/3

7/9 x 6/5= 42/45= 14/15

8/7 x 5/9= 40/63

10/11 x 22/15= 220/165= 4/3

Bài 2

2/6 x 5/3= 1/3 x 5/3=5/9

11/9 x 5/10= 11/9 x 1/2= 11/18

3/9 x 6/8= 1/3 x 3/4 =3/12= 1/4

4/9 x 12/16= 4/9 x 3/4= 12/36= 1/3

25/15 x 6/7= 5/3 x 6/7= 30/21= 10/7

6/10 x 15/20= 3/5 x 3/4= 9/20

bài 1

4/5 x 6/7 = 24/35

2/9 x 1/2 = 1/9

1/2 x 8/3 = 4/3

7/9 x 6/5 = 14/15

8/7 x 5/9 = 14/15

8/7 x 5/9 = 40/63

10/11 x 22/15 = 4/3

Ra ít bài thôi nhiều quá

a)\(x:\frac{9}{22}=44\)                                    b)\(x:\frac{5}{11}=33\)                           c)\(x:\frac{4}{33}=22\)

 \(x\)     \(=44\times\frac{9}{22}\)                        \(x\)       \(=33\times\frac{5}{11}\)                \(x\)       \(=22\times\frac{4}{33}\)    

   \(x\)      \(=18\)                                    \(x\)         \(=15\)                          \(x\)        \(=\frac{8}{3}\)

A) X : 9/22 = 44

              X=44x9/22

              X=18

B) X : 5/11 = 33

              X=33x5/11

              X=15

C) X : 4/33 = 22

              X=22x4/33

              X=8/3

\(x:\frac{9}{22}=44\)

\(x=44X\frac{9}{22}\)

\(x=18\)

vậy X = 18

\(x:\frac{5}{11}=33\)

\(x=33X\frac{5}{11}\)

\(x=15\)

vậy X = 15

\(x:\frac{4}{33}=22\)

\(x=22X\frac{4}{33}\)

\(x=\frac{8}{3}\)

vậy X = \(\frac{8}{3}\)