Giúp em toán 6 b)100-2(3x+2)=54

2 câu trả lời

`b,`

`100-2.(3x+2)=54`

`2.(3x+2)=100-54`

`2.(3x+2)=46`

`3x+2=23`

`3x=21`

`x=7`

100-2(3x+2)=54

100 - 6x - 4 = 54

96 - 6x = 54

6x = 96 - 54

6x = 42

x = 42 : 6

x = 7

Vậy x = 7