Tìm x biết : 17-(x+84)=107

2 câu trả lời

` 17 - ( x + 84 ) = 107 `

` 17 - x - 84 = 107 `

` 17 - x = 107 + 84 `

` 17 - x = 191 `

` x = 17 - 191 `

` x = -174 `

Vậy ` x = -174 `

$\text{17 - (x + 84) = 107}$

$\text{x + 84 = 17 - 107}$

$\text{x + 84 = -90}$

$\text{x = -90 - 84}$

$\text{x = -174}$