aducem la acelasi numitor
2(2x+13)-3(8+x)<2(7x+6)-5(2x-9)-2·20
4x+26-24-3x<14x+12-10x+45-40
x+2<4x+17
x-4x<17-2
-3x<15 inmultim -1
x>-15/3
x>-5
x∈(-5,+α)
c)
3(2x+17)+2(2x+1)-2·18<3(4x-5)+5·2
6x+51+4x+2-36<12x-15+10
10x+17<12x-5
10x-12x<-5-17
-2x<-22 inmultim-1
x>22/2
x>11
x∈(11,+α)
