Ответ:
1) 6 2/7 +х=12 4/7
х= 12 4/7-6 2/7
х= 6 2/7
2) 5/9*(1/2-х)=1 7/18
5/18-5/9х=1 7/18
-5/9х=5/18-1 7/18
-5/9х=8/18-25/18
-5/9х=-20/18
х=-20/18÷(-5/9)=20/18*9/5=4/2=2
Пошаговое объяснение:
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Ответ:
1) 6 2/7 +х=12 4/7
х= 12 4/7-6 2/7
х= 6 2/7
2) 5/9*(1/2-х)=1 7/18
5/18-5/9х=1 7/18
-5/9х=5/18-1 7/18
-5/9х=8/18-25/18
-5/9х=-20/18
х=-20/18÷(-5/9)=20/18*9/5=4/2=2
Пошаговое объяснение: