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 `
$\text{17 - (x + 84) = 107}$
$\text{x + 84 = 17 - 107}$
$\text{x + 84 = -90}$
$\text{x = -90 - 84}$
$\text{x = -174}$