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a) x+7>3
x>3-7
x>-4
b) 2x+3<10
2x<10-3
2x<7/:2
x<3,5
c) 8x+11≥27
8x≥27-11
8x≥16/:8
x≥2
d) 2x+5<3x+11
2x-3x<11-5
-x<6/(-1)
x>-6
e) -x + 2 ≥ x - 2
-x-x≥-2-2
-2x≥-4/:(-2)
x≤2
f)2x + 5 - x ≤ x +11
2x-x-x≤11-5
0≤6
g)2x -5 ≥ -x +10
2x+x≥10+5
3x≥15/:3
x≥5
h)x-17>-2x - 17
x+2x>-17+17
3x>0/:3
x>0
i) x < -x
x+x<0
2x<0/:2
x<0
j)2x + 5 ≤ 3x + 10
2x-3x≤10-5
-x≤5/(-1)
x≥-5
zad 2
a)2(3x - 5) + 10 > 3(2x-1)
6x-10+10>6x-3
6x-6x>-3
0>-3
b)10(x-2) - 3(x+2) ≥ 7x - 20
10x-20-3x-6≥7x-20
10x-3x-7x≥-20+20
0≥0
c)x(x+7) +14 ≥ x² + 7(x+2)
x²+7x+14≥x²+7x+14
x²-x²+7x-7x≥14-14
0≥0
d)12(x- 0,5) > 6(2x + 1)+5
12x-6>12x+6+5
12x-12x>6+5+6
0>17
e)18(x+1) - 10(0,5x +2) > -5x - 2
18x+18-5x-20>-5x-2
18x-5x+5x>-2-18+20
18x>0/:18
x>0