Odpowiedzi

2010-04-15T13:25:57+02:00
1/2-X=-1/2X
1/2=1/2x
x=1

1/2X+1/5X-1/10X=2
5/10x+2/10x-1/10x=2
6/10x=2
x=10/3
2010-04-15T13:28:39+02:00
1/2-X=-1/2X
-x + 1/2x = -1/2
-1/2x = -1/2 / * (-1/2)
x = 1


1/2X+1/5X-1/10X=2 / *10
10* 1/2x + 10* 1/5x - x = 20
5x + 2x - x = 20
6x = 20 / : 6
x = 20/6
x = 3 i 1/3

Mam nadzieje ze jest dobrze ;)
1 4 1
2010-04-15T13:35:42+02:00
1/2-X=-1/2x |-1/2 + 1/2x
1/2x-x=-1/2x
-1/2x=-1/2 |:(-1/2)
x=1

1/2X+1/5X-1/10X=2 |*10
5x+2x-x=20
6x=20 |:6
x=3 1/3

* oznacza mnożenie