Question

Решите уравнение : 17/21х+9/14=5/21
Даю 15 балов помогите пожалуйста

Answer 1

$frac{17}{21} x + frac{9}{14} = frac{5}{21} \ frac{17}{21} x = frac{5}{21} - frac{9}{14} \ frac{17}{21} x = frac{10 - 27}{42} \ frac{17}{21} x = - frac{17}{42} \ x = - frac{17}{42} div frac{17}{21} \ x = - frac{1}{2} \ ........................ \ \ frac{17}{21} times ( - frac{1}{2} ) + frac{9}{14 } = frac{5}{21} \ - frac{17}{42} + frac{9}{14} = frac{5}{21} \ frac{5}{21} = frac{5}{21}$