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2x-x+2<1+3x+1/4
x+2<1+3x+1/4 |-1
x+1<3x+1/4 |-1/4
x+3/4<3x |-x
3/4<2x |:2
1 1/2<x
b)x2(x do kwadratu)+6x+9>(x-1)(x+2)+1
x2+6x+9>(x-1)(x+2)+1 |-1
x2+6x+8>x-1*x+2
x2+6x+8>x2+1 |- x2
6x+8>1 |-8
6x>-7 |:6
x>-7/6
c)3(x+2)-2≤ 4(x+1)-8
3x+6-2≤4x+4-8
3x+4≤4x-4 |-4
3x≤4x-8 |-4x
-x≤-8 |:(-1)
xjest większe lub równe od 8
d)x-(x-1/2)>3x-5,5
x-x+1/2>3x-5,5 |+5,5
6>3x |:3
6>x
powinno być dobrze