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Determinați nr Nat care verifica relațiile a) (75-40)-(x+5)>_0. b) (21-17)-(5-x)<0.
c)(527-432)-(x+15)>_50
Dau premiu


Răspuns :

a) (75-40)-(x+5)>_0
35-(x+5)>_0
35>_x+5
35-5>_x
30>_x
x={0,1,2,3,...29,30}

b) (21-17)-(5-x)<0
4<5-x
0<5-x-4
x<5-4
x<1
x=0

c) (527-432)-(x+15)>_50
95-50>_x+15
45>_x+15
45-15>_x
30>_x
x={0,1,2,3...,30}

>_ inseamna mai mare sau egal, nu?