Question

Aflati multimea S a solutiilor inecuatiei
-5(2x+8)>x-4(x+6)
3(6-9x)<15x-2(x+1)

Answer 1

a)-10x-40>x-4x-24
   -10x-x+4x>-24+40
  -7x>16
   x>$- \frac{16}{7}$⇒S=($- \frac{16}{7}$,+∞)
b)18-27x<15x-2x-2
  -27x-15x+2x<-2-18
  -40x<-20
  x>$\frac{20}{40}=>x> \frac{1}{2}$⇒S=($\frac{1}{2}$,+∞)