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0,5x=0,1y
0,5x=0,1(x+6)
0,5x=0,1x+0,6
0,5x-0,1x=0,6
0,4x=0,6 /:0,4
x=1,5
y=1,5+6
y=7,5
50%x=10%y
0,5x=0,1(x+6)
0,5x=0,1x+0,6
0,4x=0,6
4x=6
x=6/4=3/2