Odpowiedzi

2010-04-12T16:18:22+02:00
-(2x-1)=4
-2x+1=4
-2x=4-1
-2x=3
x=-1,5


2(x+1)=x
2x+2=x
2x-x=-2
x=-2


2t-(3t+1)=6
2t-3t-1=6
2t-3t=6+1
-t=7
t=-7
2010-04-12T16:19:23+02:00
(-2x) +1=4
1-4=-2x
(-3)=-2x

x=-1,5



2. 2(x+1)=x
2x+2=x
2x-x=2
x=2



2010-04-12T16:19:40+02:00
-(2x-1)=4
-2x+1=4
-2x=3 //÷-2
x=-1½

2(x+1)=x
2x+2=x
2x-x=-2
x=-2

2t-(3t+1)=6
2t-3t=6+1
-t=7 //×-1
t=-7