(x+2^4).7^3=2.7^4 giúp mikkkkkkkkkkkkkkkkkkkkkkkkkkkk

2 câu trả lời

`(x+2⁴).7³=2.7⁴`

`⇔x+2⁴=2.7⁴:7³`

`⇔x+2⁴=2.7`

`⇔x+16=14`

`⇔x=14-16`

`⇔x=-2`

Vậy `x=-2`

 

${(x+2^4)}$ ${.}$ ${7^3}$ ${=}$ ${2}$ ${.}$ ${7^4}$

${(x+2^4}$ ${=}$ $\dfrac{7^4×2}{7^3}$ 

${(x+2^4)}$ ${=}$ ${7}$ ${.}$ ${2}$

${(x+2^4)}$ ${=}$ ${14}$

${x}$ ${+}$ ${16}$ ${=}$ ${14}$

${x}$ ${=}$ ${14}$ ${-}$ ${16}$

${x}$ ${=}$ ${(-2)}$