x:3,9=0,2:0,6
x*0.6 = 3.9 *0,2
x*0.6=0.78
x= 0.78 : 0,6
x = 1.3
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x:3,9=0,2:0,6
x*0.6 = 3.9 *0,2
x*0.6=0.78
x= 0.78 : 0,6
x = 1.3
х=1,3