Odpowiedzi

2010-04-11T21:06:23+02:00
A) 2x+6-5 >-2x-7
2x+2x > -7-1
4x>-8 /:4
x>-2

b) -2x+2+5x > 7x+12
3x-7x>12-2
-4x>10 /:(-4)
x< -2,5
2 5 2
2010-04-11T21:06:45+02:00
A) 2(x+3)-5>-2x-7
2x+6-5>-2x-7
2x+2x>-7-6+5
4x>-8 /:4
x>-2

b) -2(x-1)+5x>7x+12
-2x+2+5x>7x+12
-2x+5x-7x>12-2
-4x>10 /(-4)
x<-5/4
1 1 1