Question

Rezolvati in multimea nr. naturale:
a) x+1000 ≤ 1325 si x ≥ 124
b) 2137+x ≤ 2514 si x+43≥57
C) (250-x) - 130 ≥ 70 si x+50 ≥ 70
Urgent, va rog !!!

Answer 1

a)x+1000<_1325=> x< sau egal 1325-1000=> x< sau egal325; x> sau egal cu124
x = [124, 325 ]
b) x< sau egal  decat2514-2137 => x <sau egal 377 si x >_ 57-43; x  >14; x= [14, 377]
c)  250-130-70<_ x=> 50<_ x ;  si x>_ 70-50 x>_ 20 ; x=[20,50]