Question

4. Решите уравнение: 19 9 7 30 30 30 - (х + ) = 0 ( помогите пж ​

Answer 1

$\displaystyle \frac{19}{30}-(x+\frac{9}{30})=\frac{7}{30}\\\\\frac{19}{30}-(x+\frac{3}{10})=\frac{7}{30}\\\\\frac{19}{30}-x-\frac{3}{10}=\frac{7}{30}\\\\\frac{1}{3}-x=\frac{7}{30}\\\\-x=\frac{7}{30}-\frac{1}{3}\\\\-x=-\frac{1}{10}\\\\x=\frac{1}{10}=0,1$