Question

10.Rezolvati,in numerele naturale,inecuatiile:

a) x+3<4=
b) x+5≥17=
c) x-11≤1=
d) x-7≤3=

Answer 1

a) x+3<4
    x<4-3
    x<1, x=0

b) x+5≥17
    x≥17-5
    x≥12 , x∈{12,13...,∞}

c) x-11≤1
    x≤1+11
    x≤12, x∈{0,1,2,.....12}

d) x-7≤3
  x≤7+3
  x≤10, x∈{0,1,2...,10}