х:2/5=2 5/8-1 1/4
x:2/5=2 5/8-1 2/8
x:2/5=1 3/8
x=1 3/8*2/5
x=11/8*2/5=11/20
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х:2/5=2 5/8-1 1/4
x:2/5=2 5/8-1 2/8
x:2/5=1 3/8
x=1 3/8*2/5
x=11/8*2/5=11/20