Tách ?

`a, 70 -5.(x-3) =45`

`=> 5.(x-3)= 70-45`

`=> 5.(x-3)=25`

`=>x-3=25:5`

`=>x-3=5`

`=>x= 5+3`

`=>x=8`

______

`b,10 + 2.x = 4^5:4^3`

`=> 10 + 2.x = 4^(5-3)`

`=> 10 + 2.x =4^2=16`

`=> 2.x=16-10`

`=>2.x=6`

`=>x=6:2`

`=>x=3`

_____

`c,60-3.x-2=51`

`=>  60-3.x= 51+2`

`=> 60-3.x=53`

`=>3.x=60-53`

`=> 3.x= 7`

`=>x= 7/3`

____

`d, 4.x-20=2^5:2^3`

`=> 4.x-20=2^(5-3)`

`=> 4.x-20=2^2`

`=> 4.x= 4+20`

`=>4.x=24`

`=>x=24:4`

`=>x=6`

____

`2^x . 4=16`

`=> 2^x=16:4`

`=>2^x= 4`

`=>2^x=2^2`

`=>x=2`

____

`f, 3^x . 3=243`

`=>3^x=243:3`

`=> 3^x=81`

`=> 3^x=3^3`

`=>x=3`

_____

`g, 64. 4^x =16^8`

`=> 4^3 . 4^x=(4^2)^8`

`=> 4^3 . 4^x = 4^(16)`

`=> 4^x= 4^(16-3)`

`=>4^x=4^(13)`

`=>x=13`

_____

`2^x . 16^2 =1024`

`=> 2^x= 1024 : 16^2`

`=>2^x=4`

`=>2^x=2^2`

`=>x=2`

a: =>5(x-3)=25

=>x-3=5

=>x=8

b: =>2x=16-10=6

=>x=3

c: =>58-3x=51

=>3x=7

=>x=7/3

d: =>4x-20=4

=>4x=24

=>x=6

e: =>2^x=4

=>2^x=2^2

=>x=2

f: =>3^x=81

=>3^x=3^4

=>x=4

g: =>4^x*4^3=4^16

=>x+3=16

=>x=13

h: =>2^x=1024/256=4=2^2

=>x=2

a,  70 - 5 ( x - 3 ) = 45

⇔ 5 . x - 3 = 70 - 45

⇔ 5 x - 3 = 35

⇔ x - 3 = 35 : 5 ⇔ x - 3 = 7

⇔ x = 10

b,  10 + 2 x = 4 5 : 4 3

⇔ 10 + 2 x = 4 2 ⇔ 10 + 2 x = 16

⇔ 2 x = 4 ⇔ x = 2

c,  60 - 3 x - 2 = 51

⇔ 3 x - 2 = 60 - 51

⇔ 3 x - 2 = 9

⇔ x - 2 = 3 ⇔ x = 5

d,  4 x - 20 = 2 5 : 2 3

⇔ 4 x - 20 = 2 2 ⇔ 4 x - 20 = 4

⇔ 4 x = 24 ⇔ x = 6

a, x= 45 hoặc x= -45

b,  Không có x nào thỏa mãn.

a, x = 9

b, x = 8

c, x = -2/3

d, x = 12

Nếu bạn cần giải chi tiết thì nhắn tin cho mi'k

A) 70 - 5 . ( x - 3 ) = 45

           5 . ( x - 3 ) = 70 - 45 = 25

                  x - 3   = 25 : 5 = 5

                  x        = 5 + 3

                  x        = 8

B) 10 + 2 . x = 4⁵ : 4³

     10 + 2x   = 4² = 16

             2x   = 16 - 10 = 6

               x   = 6 : 2

               x   = 3

a,70-5.(x-3)=45

=>5.(x-3)=70-45

=>5.(x-3)=25

=>x-3=25:5

=>x-3=5

=>x=8

b,10+2x=4^5:4^3

=>10+2x=4^2

=>10+2x=16

=>2x=16-10

=>2x=6

=>x=3

a ) 70 - 5 . ( x - 3 ) = 45

             5 . ( x - 3 ) = 70 - 45

             5 . ( x - 3 ) = 25

                   x - 3 = 25 ; 5

                   x - 3 = 5

                       x = 5 + 3

                        x = 8

b) 10 + 2x = 4⁵ : 4³

      10 + 2 x = 4²

        10 + 2. x = 16

                 2x = 16 = 10

                2x = 6

                 x = 6 : 2

                 x = 3

a) 70-5(x-3)=45

5(x-3)=70-45

5(x-3)=25

x-3=25:5

x-3=5

   x=5+3

   x=8

vậy x=8

b)10+2x=4⁵:4³

10+2x=4²

10+2x=16

2x=16-10

2x=6

  x=6:2

  x=3

vậy x=3

\(a.70-5.\left(x-3\right)=45\)

            \(70-\left(x-3\right)=45:5\)

            \(70-\left(x-3\right)=9\)

                          \(x-3=70-9\)

                          \(x-3=61\)

                                    \(x=61+3\)

                                    \(x=64\)

\(b.10+2.x=4^5:4^3\)

     \(10+2.x=4^2=16\)

                 \(2.x=16-10\)

                 \(2.x=6\)

                     \(x=6:2\)

                    \(x=3\)

Học tốt !

70-5.(x-3)=45

5.(x-3)=70-45

5.(x-3)=25

x-3=25:5

x-3=5

x=5+3

x=8

bai toan nay kho

271-[(-43)+271+(-13)] = 56

40.(45-135)-40.(45+65)=-8000

32x+41=35-(-70) => x=2

tìm x thuộc z,y thuộc z biết:(x-1)(xy-5)=5 Chịu

khó cái đầu bạn á Thieu Gia Ho Hoang