Question

tìm x : 2(x - 51)= 2.2³ + 20

Answer 1

\(2(x-51)=2\cdot2^3+20\)

\(2(x-51)=2\cdot8+20\)

\(2(x-51)=16+20\)

\(2(x-51)=36\)

\(x-51=36:2\)

\(x-51=18\)

\(x=18+51\)

\(x=69\)

Answer 2

2 ( x - 51 ) = 2 . 2³ + 20

2 ( x - 51 ) = 2⁴ + 20 

2 ( x - 51 ) = 16 + 20 

2 ( x - 51 ) = 36

    ( x - 51 ) = 36 : 2 

     ( x - 51 ) = 18

       x            = 18 + 51

       x            = 69

Vậy x = 69

Tk nhé!!!

Answer 3

i) 2(x 51) = 2.23 + 20