a) \(5x+x=39-3^{11}:3^9\)    

\(\Leftrightarrow6x=39-3^2\)                    

\(\Leftrightarrow6x=30\)

\(\Leftrightarrow x=5\)

b) \(2^x:2^5=16\)

\(\Leftrightarrow2^x:2^5=2^4\)

\(\Leftrightarrow2^x=2^4.2^5\)

\(\Leftrightarrow2^x=2^9\)

\(\Leftrightarrow x=9\)

c) \(7x-x=5^{21}:5^{19}+3.2^2-7^0\)

\(\Leftrightarrow6x=5^2+3.4-1\)

\(\Leftrightarrow6x=36\)

\(\Leftrightarrow x=6\)

d) \(7x-2x=6^{17}:6^{15}+44:11\)

\(\Leftrightarrow5x=6^2+4\)

\(\Leftrightarrow5x=40\)

\(\Leftrightarrow x=8\)

a)⇔6x=39-3²                                             

   ⇔6x=30                                             

   ⇔ x=5                                                

b)2^x:2⁵=16

⇔2^x=2⁴.2⁵ 

⇔ 2^x=2⁹                                                   

⇔ x=9

c)⇔6x=5²+3.2²-1

  ⇔ 6x= 36

  ⇔ x=6

d)⇔5x=6²+4

   ⇔ 5x=40

   ⇔ x=8

a: \(\Leftrightarrow6x=30\)

hay x=5

b: \(\Leftrightarrow6x=25+12-1=36\)

hay x=6

A x=5

B x = 6 (36)

a: \(\Leftrightarrow8x=108+12=120\)

hay x=15

b: \(\Leftrightarrow6x=60\)

hay x=10

a) 5x + 3x = 120
    x . (5+3)= 120
    x . 8       = 120
    x            = 120 : 8
    x            = 15

c) 7x - 2x = 40
    x .(7-2)= 40
    x . 5     = 40

    x          = 40 : 5
    x          = 8

7x-2x=6^11:6^15+44:11

x7-2=1/1296+4

x5=5185/1296

x=5185/1296:5

x=1037/1296

tick cho mk nha bạn thùy nguyễn

7x-2x=6¹⁷/6¹⁵+44/11

(7-2)x=6^17-15+4

5x=6²+4=36+4

x=40/5

x=8

x=8

tick nhé

7x - 2x = 6¹⁷ : 6¹⁵ + 44 : 11

7x - 2x = 6² + 4

7x - 2x = 40

5x = 40

x = 8

7x-2x=6^17:6^15+44:11

5x=6^17-15+4

5x=6^2+4

5x=36+4

5x=40

x=8

chúc bn hok tốt

\(7x-2x=6^{17}:6^{15}+44:11\)

\(5x=6^2+4\)

\(5x=36+4\)

\(5x=40\)

\(x=40:5\)

\(x=8\)

Vậy \(x=8\).

\(7x-2x=6^{17}:6^{15}+\dfrac{44}{11}\)

= \(7x-2x=6^{17}:6^{15}+4\)

= \(7x-2x=6^{17}:6^{15}+4\)

=\(7x-2x=6^2+4\)

=\(7x-2x=36+4\)

= \(7x-2x=40\)

=> x.(7-2)= 40

=> x.5=40

=> x=8

7x-2x=6¹⁷:6¹⁵+44:11

7x-2x=6²+44:11

7x-2x=6²+4

7x-2x=36+4

7x-2x=40

(7-2)x=40

5x=40

x=40:5

x=8

Chúc bạn học tốt

7x - 2x = 6¹⁷ : 6¹⁵ + 44 : 11

\(\Rightarrow\) 5x = 6² + 4

\(\Rightarrow\) 5x = 36 - 4

\(\Rightarrow\) 5x = 32

\(\Rightarrow\) x = 6,4

7x - 2x = 6¹⁷ : 6¹⁵ + 44 : 11

7x - 2x = 6² + 4

7x - 2x = 36 + 4

7x - 2x = 40

x(7 - 2) = 40

x5 = 40

x = 40 : 5

x = 8.

\(7x-2x=6^{17-15}+4\)

\(7x-2x=6^2+4\)

\(7x-2x=36+4\)

\(7x-2x=40\)

\(x\left(7-2\right)=40\)

\(x5=40\)

\(x=40:5\)

\(x=8\)

thank

7x-2x=6^17:6^15+44:11

=>2x=6^(17-15)+4

=>2x=6^2+4

=>2x=36+4

=>2x=40

=>x=40:2

=>x=20

5x=6^2+4

5x=40

x=40:5=8

Vậy x=8

7x - 2x = 6^17 : 6^15 + 44 : 11

5x         = 6^2 + 4

5x          = 36+4

5x            = 40

x              = 8