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

\(10+2x=4^2=16\)

\(2x=16-10\)

\(2x=6\)

\(x=6:2\)

\(x=3\)

\(2x+10=4^5:4^3\\ 2x+10=4^2\\ 2x+10=16\\ 2x=6\\ x=3\)

Vậy x = 3

10 + 2x = 45 : 43

10 + 2x = 45 - 3

10 + 2x = 42

10 + 2x = 16

2x = 16 - 10

2x = 6

x = 6 : 2

x = 3

Vậy x = 3

Tìm số tự nhiên x biết: 10 + 2x = 4⁵:4³

a) \(2^x:4=16\\ \Rightarrow2^x=64\\ \Rightarrow2^x=2^6\\ \Rightarrow x=6\)

b) \(4^{x-3}=256\\ \Rightarrow4^{x-3}=4^4\\ \Rightarrow x-3=4\\ \Rightarrow x=7\)

c) \(\left(2x+1\right)^3=343\\ \Rightarrow\left(2x+1\right)^3=7^3\\ \Rightarrow2x+1=7\\ \Rightarrow x=3\)

d) \(10+2x=4^5:4^3\\ \Rightarrow10+2x=16\\ \Rightarrow x=3\)

a,2^x:4=16            

2^x=16.4=64

2^x=2^6

=>x=6

b,4^x-3=256

4^x-3=4^4

=>x-3=4

x=4+3=7

c,(2x+1)^3=343

(2x+1)^3=7^3

=>2x+1=7

2x=7-1=6

x=6:2=3

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

10+2x=4^2=16

2x=16-10=6

x=6:2=3

vc đăng bài giống nhau ạ

a, 2^x : 4 = 16

⇒ 2^x : 2² = 2⁴

⇒ x - 2 = 4

⇒ x       = 6

b, 4^x-3 = 256 

⇒ 4^{x - 3} =  4⁴

⇒ x - 3 = 4

⇒ x       = 7

c, (2x + 1)³ = 343

⇒ (2x + 1)³ = 7³

⇒  2x + 1 = 7

⇒ 2x        = 6

⇒ x          = 3

d, 10 + 2x = 4⁵ : 4³

⇒ 10 + 2x = 16

⇒          2x = 6

⇒             x = 3

a: 3x=81

nên x=27

b: \(5\cdot4^x=80\)

\(\Leftrightarrow4^x=16\)

hay x=2

c: \(2^x=4^5:4^3\)

\(\Leftrightarrow2^x=2^4\)

hay x=4

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

\(\text{1/ (2x - 5) +17 =6}\\ 2x-5=6-17\\ 2x-5=-11\\ 2x=-11+5\\ x=-6:2\\ x=-3\)

\(2x-5=-11\Leftrightarrow x=-3\)

\(\text{2/ 10 - 2(4 - 3x) = - 4}\\ 2\left(4-3x\right)=10-\left(-4\right)\\ 2\left(4-3x\right)=14\\ 4-3x=14:2\\ 4-3x=7\\ 3x=4-7\\ x=-3:3\\ x=-1\)

\(10:2x=16\\ 2x=\dfrac{5}{8}\\ x=\dfrac{5}{16}\)

10 + 2x=4^5 : 4^3
10 + 2x =4^2
10 + 2x =16
        2x=16 - 10
        2x=6
          x=6:2
          x=3

a,

x-43+7=49-(50+3)

<=>x-36=49-53

<=>x-36=-4

<=>x=-4+36

<=>x=32

b

-(x-16)+70=45

<=>-x+16+70=45

<=>-x+86=45

<=>x=86-45

<=>x=41

Bài 2

a.,

2x-(-60)=3x-18

<=>2x+60=3x-18

<=>3x-2x=60+18

<=>x=78

b,

-45-5x=10-4x

<=>-4x+5x=-45-10

<=>x=-55

Nếu thấy bài làm của mình đúng thì tick nha bạn,mình xin chân thành cảm ơn.

a) x-  43 + 7 = 49 - (50 + 3)

x - 36 = -4

x = -4 + 36

x = 32

b) -(x - 16) + 70 = 45

-(x - 16) = -15

x - 16 = 15

x = 31

Bài 2:

2x - (-60) = 3x - 18

2x + 60 = 3x - 18

3x - 2x = 60 + 18

x = 78

b) -4- 5x = 10 - 4x

5x - 4x = -4 - 10

x = -14