2 câu trả lời
`@` Tham khảo `@`
`2x-2^4``:2^2= -20`
`2x-2^(4-2)= -20`
`2x-2^2= -20`
`2x-4= -20`
`2x= -20+4`
`2x= -16`
`x= -16:2`
`x= -8`
Vậy `x= -8`
`#Jo`
`2x - 2^4 : 2^2 = -20`
`2x - 2^2 = -20`
`2x - 4 = -20`
`2x = -20 + 4`
`2x = -16`
`x = -16 : 2`
`x = -8`
`Vậy: x = -8`