Odpowiedzi

2009-12-07T19:07:12+01:00
A) 7(x-2)-x=2(2x+1)
7x-14-x=4x+2
6x-14=4x+2
6x-4x=2+14
2x=16/2
x=8

b) 6x-2(x-4)
_________=8
3

6x-2x+8
________ =8 /3
3

6x-2x+8=24
4x=24-8
4x=16/4
x=4

c) 2x-(1-x)=11-x
2x-1+x=11-x
3x+x=11+1
4x=12/4
x=3
2009-12-07T19:10:05+01:00
A) 7x-14-x=4x+2
7x-4x-x=2+16
2x=18
x=9
B)6x-2x+8=8
4x=8-8
x=0

C)2x-1+x=11-x
2x+x+x=11+1
4x=12
x 3