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Dau coroana!Rezolvati in Z inecuatiile:
a)5(x-1)-3(x+3)≥2(1-x)
b)3(2x+5)+2(1-2x)≤5(x+3)-1
c)4(6x-5)-7(2x-3)>5(2x-1)
d)7x-3(x+5)+2(2x-5)≤4-(14-5x)


Răspuns :

a)5x-5-3x-9≥2-2x
5x-3x+2x≥5+9+2
0x≥16
x≥16/0
x∈∅
b)6x+15+2-4x≤5x+15-1
6x-4x-5x≤-15-2+15-1
-3x≤-3
x≥-3/-3
x≥1
c)24x-20-14x+21>10x-5
24x-14x-10x>20-21-5
0x>-4
x∈∅
d)7x-3x-15+4x-10≤-56-20x
7x-3x+4x+20x≤15+10-56
0x≤-31
x∈∅