Ответ:
10/15+(5/15-х)=14/15
5/15-х=14/15-10/15
5/15-х=4/15
х=5/15-4/15
х=1/15
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Ответ:
10/15+(5/15-х)=14/15
5/15-х=14/15-10/15
5/15-х=4/15
х=5/15-4/15
х=1/15