Odpowiedź:
3)
a)-(2x-1)=4
-2x+1=4
-2x=3
x=-3/2=-1 1/2
b)2(x+1)=x
2x+2=x
2=-x
x=-2
c)2t-(3t+1)=6
2t-3t-1=6
-t=7
t=-7
d)-(4+x)=2(3-x)
-4-x=6-2x
x=10
e)3(y+6)-y=2(y+9)
3y+18-y=2y+18
2y-2y=18-18
0=0
f)x-7-2(3x+5)=3
x-7-6x-10=3
-5x=3+10+7
-5x=20
x=29:(-5)=-4
