Question

resolva as inequações abaixo: 4×-20 <0

Answer 1

$4x - 20 < 0 \\ 4x < 20 \\ x < 20 \div 4 \\ x < 5$

Answer 2

4x-20 < 0

4x < 20

 x < 20/4

 x < 5

Resposta → S= {x ∈ R | x < 5}