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4(2x+4)=16
2x+4=4
2x=0
x=0
b. 6(x+2)+2(x-1)=8
6x+12+2x-2=8
8x+10=8
8x=-2
x=-1/4
c. 6(x+4)-3(x-8)=-16
6x+24-3x+24=-16
3x+48=-16
3x=-64
x=-21,33
d. 7x-4(2x+5)>10
7x-8x-20>10
-x-20>10
-x>30
x<-30
e. 6(x-5)+2>12
6x-30+2>12
6x-28>12
6x>40
x>6,6667
f. 3(2x-1)-2(2x-2)<4(1+2x)
6x-3-4x+4<4+8x
2x+1<4+8x
2x-8x<4-1
-6x<3
-x<1/2
x>-1/2