Ответы на вопрос:
21/6 - (х-1 1/12) = 1/4 13/6 - (х-13/12) = 1/4 26/12 - (х-13/12)=3/12 26/12-х+13/12=3/12 26/12+13/12-3/12=х 36/12=х х=4 8 1/3 - (5 2/15 -х)= 3 2/9 25/3 - (77/15 - х) = 29/9 375/45 - (231/45-х)=145/45 375/45-231/45+х=145/45 х=145/45-375/45+231/45 х=1/45
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