Question

[Asuna Yuuki]

tìm x biết :

a) ( 5.x - 1 ) : 3 + 1 = 4

b) 54 : ( 16 - x ) - 1 = 5

c) 3^2 . x + 15 = 60

d)2x^3 = 54

e) 2^x+1 = 64

Answer 1

[Kagamine Len]

a) (5x - 1) : 3 + 1 = 4

=> (5x - 1) : 3 = 3

=> (5x - 1) = 9

=> 5x - 1 = 9

=> 5x = 10

=> x = 2

Answer 2

[Izumiki Akiko]

b) 54 : (16 - x) - 1=5

=> 54:(16-x) = 6

=> 16-x = 9

=> x = 7