Odpowiedzi

2010-02-07T13:57:33+01:00
3(x-1)-2 = 12-(4-x)
3x - 3 - 2 = 12 - 4 + x
3x - x = 12 - 4 + 3 + 2
2x = 13 : 2
x = 6,5
2010-02-07T13:57:55+01:00
3(x-1)-2=12-(4-x)
3x-3-2=12-4+x
3x-5=8+x
2x=13
x=13/2
x=6 1/2=6,5
2010-02-07T15:02:52+01:00
3(x-1)-2 = 12-(4-x)
3x - 3 - 2 = 12 - 4 + x
3x-5=x+8
2x=13 /:2
x=13/2=6,5