Odpowiedzi

2009-12-30T15:36:29+01:00
3x-(x+5)=-1
3x - x - 5 = - 1
2x = -1 + 5
2x = 4 /:2
x = 2

2(x+1)-4x+1
2x + 2 - 4x + 1
-2x + 3
2009-12-30T15:36:52+01:00
3x-x-5=-1
2x-5=-1
2x=-1+5
2x=4
x=2

2(x+1)-4x+1
2x+2-4x=1
-2x+2=1
-2x=-1
x=1/2
2009-12-30T15:37:34+01:00
3x-(x+5)=-1
3x-x-5=-1
2x=-1+5
2x=4 /:2
x=2

2(x+1)-4x=1
2x+2-4x=1
-2x=1-2
-2x=-1 /: (-2)
x=½

:)