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3x=5x+1/-5x
-2x=1
x=-1/2
y-3=9-y/+y
2y-3=9/+3
2y=12
y=6
1/2z+6=z-1/-z
-1/2z+6=-1/-6
-1/2z=-7/:(-1/2)
z=14
2(5x-1)=8
10x-2=8/+2
10x=10
x=1
1/3(y-1)=5y
1/3y-1/3=5y/+1/3
1/3y=5y+1/3/-5y
-42/3y=1/3/:42/3
y=-1/14
6z+8:2=4
6z+4=4
6z=0
z=0