Đáp án:
`↓`
Giải thích các bước giải:
`a) x - 1/2 = 3/8 . ( -2 2/3)`
`x -1/2 = 3/8 . (-8)/3`
` x - 1/2 =-1`
` x = -1 + 1/2 `
` x = -2/2 + 1/2`
` x = -1/2`
` b) ( x+5)/6 = (-2)/3`
` (x+5)/6 = (-4)/6`
`=> x + 5 = -4`
` => x = -4 - 5`
` => x = -9`
`c) 5/11 . 16/10 - ║ x + 1/3 ║ = 5/22`
` 5/11 . 8/5 - ║ x + 1/3 ║ = 5/22`
` 8/11 - ║ x + 1/3 ║ = 5/22`
` ║ x + 1/3 ║ = 8/11 - 5/22`
` ║ x + 1/3 ║ = 16/22 - 5/22`
` ║ x + 1/3 ║ = 11/22`
` ║ x + 1/3 ║ = 1/2`
Xét 2 TH :
` x + 1/3 = 1/2`
` x = 1/2 - 1/3`
` x = 1/6`
` x + 1/3 =-1/2`
` x = -1/2 - 1/3`
` x = -5/6`
