Question

Rezolvati in multimea numerelor naturale ineecuatiile:
a) x+4≤7
b) 11-x>5
c)18:x≤2
d)x:3≤4

Answer 1

a) x+4≤7<=>x≤7-4<=>x≤3
b) 11-x>5<=>x<11-5<=>x<6
c)18:x≤2<=>x≥18:2<=>x≥9, x<0
d)x:3≤4<=>x≤3*4<=>x≤12

Answer 2

a)  x≤7-4     x≤3   x= {0,1,2,3}
b) x < 11-5    x< 6   x={0,1,2,3,4,5}
c)  x≥ 18:2   x≥9    x={9,10,11,......}
d) x ≤4 .3    x≤12    x={12,11,10.9,8.......1,0}