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Gugustiuc11
a fost răspuns

Determinati numerele naturale care verifica inegalitatile:
a)243:(x-4)>9 si x:5>(cu linie dedesubt)2

b) (2•x+3•x):5<(cu linie dedesubt)8

c) [4•(13•x+5•x)]:36<(cu linie dedesubt)30

Răspuns :

Crazydalia33
a)243:(x-4)>9
x-4>243:9
x-4>27
x>27+4
x>31

x:5≥2
x≥5·2
x≥10
x∈[10,+α)
b)2x+3x≤8*5
5x≤40
x≤40:5
x≤8
x={0,1,2..8}
c)4(65+5x)<30x36
260+20x<1080
20x<1080-260
20x<820
x<820:20
x<41
x={0,1,2..40}

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