$\frac{-2}{4}$ = $\frac{11-x}{8}$

2 câu trả lời

`{-2}/4 = { 11 - x }/8`

`=> {-1}/2 = { 11 - x }/8`

`=> 2. ( 11 - x ) = ( -1 ). 8`

`=> 22 - 2x = -8`

`=> 2x = 22 - ( -8 )`

`=> 2x = 30`

`=> x = 30 : 2`

`=> x = 15`

 Vậy `x = 15`

`{-2}/4 = { 11 - x }/8`

`=> {-1}/2 = { 11 - x }/8`

`=> 2. ( 11 - x ) = ( -1 ). 8`

`=> 22 - 2x = -8`

`=> 2x = 22 - ( -8 )`

`=> 2x = 30`

`=> x = 30 : 2`

`=> x = 15`

 $Vậy$ `x = 15`