Question

Tim x , biet:

a) 34 - ( x +50) = 18

b) 2^{x - 1} = 8

Answer 1

a) 34 - ( x +50) = 18

<=> x+50 = 34-18

<=> x + 50 = 16

<=>  x = 16- 50

<=> x = - 34

b) 2^{x - 1} = 8

<=> 2^x-1 = 2³

<=> x - 1 = 3

<=> x = 3+1

<=> x = 4

Answer 2

haizzz ghi đề sai may nỏ

b) 2^x-1 = 8

2^x-1 = 2³

=> x - 1 = 3

=>      x = 3 + 1

=>      x = 4