переведите обычную дробь в десятичное число и решите уравнения:                       1) x+(6 2/5-4,91)=5,35;
2) y+(9,31-7 1/4)=8,2;
3) (7,43-2 3/25)+x=7;
4) (8,61-3 3/4)+y=12,1.
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