a)3-6x=2-4x
-6x+4x=2-3
-2x=-1 (-1)
x=1/2
b)2x+(3-6x)=-17
2x+3-6x=-17
-4x=-17-3 (-1)
x=20/4
x=5
c)2(x+1)=3(x-1)
2x+2=3x-3
2x-3x=-3-2
-x=-5 (-1)
x=5
d)1/5(2x-1)=4
2x/5-1/5=4
2x/5=4+1/5
2x/5=(20+1)/5
2x/5=21/5 ·5
2x=21
x=21/2
e)2/3(4x-1/3)=1/9
8x/3-2/9=1/9
8x/3=1/9+2/9
8x/3=3/9
8x/3=1/3 ·3
8x=1
x=1/8
f)2(x+1)=4-(1-2x)
2x+2=4-1+2x
2x-2x=3-2
0=1
nu are solutie
