Rozwiąż nierówność:
a) 10(x-2)-3(x+2)≥7x-20
b) 7(x-1)-3(2x+3)≤2(x+2)-22
c) x(x+7)+14≥x²+7(x+2)
d) 12(x-0.5)>6(2x+1)+5
e) 18(x+1) - 10(0.5x+2)>-5x-2
Z góry dzięki ;]
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a)10x-20-3x-6>/7x-20
7x-7x>/-20+20+6
0>/6
b)7x-7-6x-9</2x+4-22
x-2x</-18+16
-x=-2/(-1)
x=2
c)x^{2}+7x+14>/x^{2}+7x+14
x^{2}-x^{2}+7x+14>/7x+14
7x-7x>/14-14
0>/0
d)12x-7,2>12x+6+5
0>11+7,2
0>18,2
e)18x+18-5x-20>-5x-2
13x+5x>-2-18+20
18x>0/18
x>0