Question

Resolva as inequações abaixo:

a) -3x < 9

b)2(-x + 4) > 16

c) 5x - 3 < 18

Answer 1

Olá, tudo bem?

$a) -3x < 9\,\,(-1)\to 3x>-9\to\boxed{x>-3}\\\\b) 2(-x + 4) \textgreater 16\to -2x+8>16\to-2x>8\,\,(-1)\\\\2x<-8\to\boxed{x<-4}\\\\c) 5x - 3 \textless 18\to 5x<21\to\boxed{x<\dfrac{21}{5}}$

É isso!! :)