Question

Giup minh với gấp quá gâpssssssssssssssssssssssssssssssssss

Answer 1

(3x - 7)³ = 2³.3² + 53

(3x - 7)³ = 8.9 + 53

(3x - 7)³ = 72 + 53

(3x - 7)³ = 125

(3x - 7)³ = 5³

3x - 7 = 5

3x = 5 + 7

3x = 12

x = 12 : 3

x = 4

Answer 2

 

(3x-7)³ = 2³.3²+53

(3x-7)³=8.9+53

(3x-7)³=72+53

(3x-7)³=125

(3x-7)³= 5³

=> 3x-7=5
3x= 5+7

3x=12

x= 12:3

x=4

Vậy x=4

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