8. Найдите значение выражения: ( 13/7 )^2 *(7/10 )^3 *(8/21+ 1/3 )^2. А. 8/75; Б. 1/50; В. 5/14 ; Г. 7/25. 9. Решите уравнение: 1 2/3 +(х-4 7/9)=4 1/3.
А. 2;
Б. 1 2/5;
В. 7;
Г. 7 4/9.
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