Question

Giari bptr sau

\(\dfrac{7x-1}{6}+2x\ge\dfrac{16-x}{5}\)

Answer 1

  `[ 7x - 1 ] / 6 + 2x >= [ 16 - x ] / 5`

`<=> [ 5 ( 7x - 1 ) + 60x ] / 30 >= [ 6 ( 16 - x ) ] / 30`

`<=> 35x - 5 + 60x >= 96 - 6x`

`<=>101x >= 101`

`<=> x >= 1`

Vậy `S = { x | x >= 1 }`

Answer 2