Автор - vitalicp

X + 1/5 = 1 ; 1 - X = 3/8 ; a/11 + 4/11 = 1

Ответ

Автор - milhouse1
 x + frac{1}{5} = 1 : : : : \ x = 1 - frac{1}{5} \ x = frac{4}{5}
.............

1 - x = frac{3}{8} \ - x = frac{3}{8} - 1 \ - x = frac{3}{8 } - frac{8}{8} \ - x = - frac{5}{8} \ x = frac{5}{8}
.............

 frac{a}{11} + frac{4}{11} = 1 \ frac{a}{11} = 1 - frac{4}{11} \ frac{a}{11} = frac{7}{11} \ 11a = 77 \ a = 7

Ответ

Автор - Masha111185
X=1-1/5
X= 5/5 - 1/5
X = 4/5

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