Odpowiedzi

2010-03-17T18:22:36+01:00
1. 3-y<5+y-2y
-y-y+2y<5-3
0<2
2. 7y-2(y-4≥6-(2-y)
7y-2y+8≥6-2+y
5y-y≥6-8
4y≥-2 /:4
y≥-0,5