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8x-3=54
8x=54+3
8x=57
x= 8 i 1/8
b)2(x+7)=3(2x-5)
2x+14=6x-15
2x-6x= -15-14
-4x= -29
x= 7 i 1/4
c)3(x-5) +7=x+1
3x-15+7=x+1
3x-x= 1+15-7
2x=9
x= 4 i 1/2
d)6(1-1/3x)=2(1+1/2x)
6-2x=2+x
-2x-x= 2-6
-3x= -4
x= 1 i 1/3
e)0,3x-2(0,1x+1)=0
0,3x-0,2x-2=0
0,1x= 2
x=20
f)0,5(x-3)+0,25(2x +6)=5
0,5x-1,5+0,5x+1,5=5
x=5