Question

Задание14.
Решите уравнение:
1)
$\frac{19}{27} - (x + \frac{10}{27} ) = \frac{2}{27}$
2)
$( \frac{19}{15} - \frac{11}{15} ) + x = \frac{8}{15}$
3)
$\frac{5}{9} + x = \frac{8}{9} - \frac{1}{9}$
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Answer 1

$\frac{19}{27}-(x+\frac{10}{27} )=\frac{2}{27}\\ -(x+\frac{10}{27})=\frac{2}{27}-\frac{19}{27}\\ -x-\frac{10}{27} =-\frac{17}{27} \\ -x=-\frac{17}{27} + \frac{10}{27}\\ -x = - \frac{7}{27} /*(-1) ; x=\frac{7}{27}$

$(\frac{19}{15}-\frac{11}{15})+x=\frac{8}{15}\\ \frac{8}{15}+x=\frac{8}{15}\\ x=\frac{8}{15}-\frac{8}{15} ; x = 0$

$\frac{5}{9}+x=\frac{8}{9}-\frac{1}{9} \\ \frac{5}{9}+x=\frac{7}{9}\\ x= \frac{7}{9} -\frac{5}{9}; x = \frac{2}{9}$