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Rezolvati miltimea nr reale inrcuatia2x+4<=16

Răspuns :

2x+4<=16
2x <=16-4
2x<= 12
x<= 6 
x∈ (-∞;6]
2x+4<=16
2x <= 16 - 4
2x <= 12
x <= 12 : 2
x <=6

x ={ - inf. ....   0,1,2,3,4,5,6}