Odpowiedzi

2010-03-03T18:42:29+01:00
A) 6x-(x+1)= 6
6x-x-1=6
5x=7
x=7/5

b)2(x-1)+3(x-2)=7
2x-2+3x-6=7
5x=15
x=3

c)x+4-5(x-8)=x-6
x+4-5x+40=x-6
-5x=-46
x=9,2
2010-03-03T18:50:37+01:00
A) 6x-(x+1)=6
6x +x=6-1
7x=5 / :7
x = 0,(7142)


b)2(x-1)+3(x-2)=7
2x -2 +3x -6 = 7
2x +3x = 7 +2 +6
5x= 15 / 5
x =3


c) x+4-5(x-8)=x-6
x +4 - 5x - 40 = x -6
-3x= -6-4 +40
-3x= 30 / (-3)
x = 10