Question

Giải BPT sau

-x+5 > 9-2x

Answer 1

\(\Leftrightarrow-x+2x>9-5\)

\(\Leftrightarrow x>4\)

Answer 2

`-x+5 > 9-2x`

`<=>-x+2x > 9-5`

`<=>x > 4`

Vậy `S={x|x > 4}`

Answer 3

-x+5 > 9-2x

\(\Leftrightarrow-x+5-9+2x>0\)

\(\Leftrightarrow x-4>0\Leftrightarrow x>4\)

Answer 4

-x+5>9-2x \(\Rightarrow\) 2x-x>9-5 \(\Rightarrow\) x>4.