|3/4-x|=7/12. 1/2x+1/8x=3/4. so sánh 11/12 và 12/11(giải thích)

2 câu trả lời

`|3/4 - x| = 7/12`

`=> 3/4 - x in {7/12; -7/12}`

`=> x in {1/6; 4/3}`

Vậy `x in {1/6; 4/3}`

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`1/2 x + 1/8 x = 3/4`

`(1/2 + 1/8) x = 3/4`

`5/8 x = 3/4`

`x = 3/4 : 5/8`

`x = 6/5`

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`11/12 < 1`

`12/11 > 1`

`=> 11/12 < 12/11`