8. Реши уравнения и выполни проверку: 1) 18,24 - y = 20; 2) z - (-4$$\frac{7}{27}$$) = 6$$\frac{5}{9}$$.

8. Решим уравнения и выполним проверку: 1) 18,24 - y = 20 -y = 20 - 18,24 -y = 1,76 y = **-1,76** Проверка: 18,24 - (-1,76) = 18,24 + 1,76 = 20 2) z - (-4$$\frac{7}{27}$$) = 6$$\frac{5}{9}$$ z + 4$$\frac{7}{27}$$ = 6$$\frac{5}{9}$$ z = 6$$\frac{5}{9}$$ - 4$$\frac{7}{27}$$ z = 6$$\frac{15}{27}$$ - 4$$\frac{7}{27}$$ z = 2$$\frac{8}{27}$$ z = **2$$\frac{8}{27}$$** Проверка: 2$$\frac{8}{27}$$ - (-4$$\frac{7}{27}$$) = 2$$\frac{8}{27}$$ + 4$$\frac{7}{27}$$ = 6$$\frac{15}{27}$$ = 6$$\frac{5}{9}$$