Question

tìm x;

40:[2.(x-19)]=5

34-3(x+1)^3=37

Answer 1

40:[2.(x-19)]=5
2(x-19)=8
x-19=4
x=23
34-3(x+1)^3=37
3(x+1)^3=(-3)
(x+1)^3=(-1)
x+1=(-1)
x=(-2)

Answer 2

40 : [ 2 . ( x - 19 ) ] = 5 

2 . ( x - 19 ) = 40 : 5 

2 . ( x - 19 ) = 8 

x - 19 = 8 : 2 

x - 19 = 4 

x = 4 + 19 

x = 23 

Vậy x = 23 

34 - 3 ( x + 1 ) ^3 = 37 

3 ( x + 1 ) ^3 = 34 - 37 

3 ( x + 1 ) ^ 3 = -3

( x + 1 ) ^3 = -3 : 3 

( x + 1 ) ^ 3 = -1 

x + 1 = -1 

x = -1 - 1 

x = -2 

Vậy x = -2