Question

3 (4x+7)-(4x-9)<7x-11

Answer 1

Vamos lá:

3(4x+7)-(4x-9)<7x-11
12x + 21 -4x + 9 < 7x -11
8x-7x<-11-21-9

x < -41

{ x ∈ R tal que x < -41}

Espero Ter Ajudado!!!

Answer 2

3.(4x + 7) - (4x - 9) < 7x - 11
12x + 21 - 4x + 9 < 7x - 11
12x - 4x + 21 + 9 < 7x - 11
8x + 30 < 7x - 11
8x - 7x < - 11 - 30
x < - 41

R.: {x E R / x < - 41}