Question

Tìm x 

a) 2^x+1 +54 =86

Answer 1

\(2^{x+1}+54=86\)

\(\Leftrightarrow2^{x+1}=32\)

\(\Leftrightarrow2^{x+1}=2^5\)

\(\Leftrightarrow x+1=5\)

\(\Leftrightarrow x=4\)

Answer 2

a) 2^x+1 + 54 = 86

=> 2^x+1 = 86 - 54

=> 2^x+1 = 32

=> 2^x+1 = 2⁵

=> x + 1 = 5

=> x = 5 - 1

=> x = 4

Vậy x = 4

Answer 3

2^x+1+54=86

2^x+1=86-54

2^x+1=32

2^x+1=2⁵

=>x+1=5

         x=5-1

         x=4

vậy x=4

Answer 4

a) 2^x+1 + 54 = 86

2^x+1 = 86 - 54

2^x+1 = 32

2^x . 2 = 32

2^x = 32 : 2

2^x = 16

=> x = 4

Answer 5

2^x+1 +54=86       

  2^x+1     =86-54  

  2^x+1     =32

=>2^x+1   =2⁵

=> x+1   = 5

     x       = 5-1

     x       =4

Answer 6

   2^x+1=86-54

   2^x+1=32

   2^x+1=2⁵

=>x+1=5

=>    x=4