Odpowiedzi

2010-03-06T13:22:11+01:00
Oblicz;
a)7y-2(y-4)≥6-(2-y)
7y-2y+8≥6-2+y
7y-2y-y≥6-2-8
4y≥-4 /:4
y≥-1
b) -²/₃y-(2-3y)<5y+2(1-y)
-²/₃y-2+3y<5y+2-2y
-²/₃y+3y-5y+2y<2+2
²/₃x<4 /*3/2
x<6






2 5 2
2010-03-06T13:23:38+01:00
A)7y-2(y-4)≥6-(2-y)
7y-2y+8≥6-2+y
4y≥-4
y≥-1

b)-²/₃y-(2-3y)<5y+2(1-y)
-²/₃y-2+3y<5y+2-2y
-²/₃y<4
2y<-12
y<-6
1 5 1