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-3(z-2)-2≤z-5-4z
-3z+6-2≤z-5-4z
-3z-z+4z≤-5-6+2
0≤-9
d)
7y-2(y-4)≥6-(2-y)
7y-2y+8≥6-2+y
7y-2y-y≥6-2-8
4y≥-4
x≥-1
e)
4(2-x)-3(1-x)<5(1-x)
8-4x-3+3x<5-5x
-4x+3x+5x<5-8+3
4x<0
x<0
f)
-dwie trzecie y-(2-3y)<5y+2(1-y)
-⅔y-2+3y<5y+2-2y
-⅔y+3y-5y+2y<2+2
-⅔y<4
y>-6