`***`Lời giải`***`
a)
`-3x + 2 > 5`
`<=>-3x > 5-2`
`<=>-3x > 3`
`<=>-x > 1`
`<=>x <- 1`
Vậy `S={x`/`x <- 1}`
_______),_/_/__/__/__/_,_/__/__/___/__/_>
-1 0
b)
`\frac{4x-5}{3}>\frac{7-x}{5}`
`<=>\frac{5(4x-5)}{15}>\frac{3(7-x)}{15}`
`<=>5(4x-5)>3(7-x)`
`<=>20x-25>21-3x`
`<=>20x+3x>21+25`
`<=>23x>46`
`<=>x>2`
Vậy `S={x`/`x >2}`
_/__/_//_/_/,/__/_/_/_(,___________>
0 2