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
`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