Question

7 ( x - 1 ) < 5 - 2 x

Answer 1

7x-7 < 5-2x

7x+2x < 5+7

9x < 12

x < 12/9  → Simplifique!

x < 4/3

Resposta → S= {x ∈ R | x < 4/3}

Answer 2

7 (x-1)<5-2x
7x+2x <5+7
9x <12
x <12
x <12/9
x <4/3.

espero ter ajudado !!