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0,7(2)·100x= 72,2222
100x-10x=72,2222-7,2222
90x=65 /:90
x=65/:90
x=13/18
0,7(2)·100x= 72,(2)
72,(2)-7,(2)= 100x-10x
65=90x //90
65/90=x
13/18=x
spr:13:18=0,7(2)