Пошаговое объяснение:
10x=5.8+3 2/5;
10x=5 4/5 + 3 2/5;
10x= 9 1/5;
x= 9 1/5 : 10;
x=46/5 * 1/10;
x=46/50;
x= 23/25.
***
100x=28 1/2-3.7;
100x= 28.5 - 3.7;
100x=24.8;
x= 24.8 : 100;
x=0.248.
