Question

Решите
У+3/8
----------------=4/7
7/20-7/8

Answer 1

Решить уравнение.

$dfrac{y + frac{3}{8}}{frac{7}{20} - frac{7}{8}} = dfrac{4}{7};\y + dfrac{3}{8} = dfrac{4}{7}left(dfrac{7}{20} - dfrac{7}{8}right);\y + dfrac{3}{8} = dfrac{7}{20}*dfrac{4}{7} - dfrac{7}{8}*dfrac{4}{7};\y + dfrac{3}{8} = dfrac{1}{5} - dfrac{1}{2};\y + dfrac{3}{8} = dfrac{2 - 5}{10};\y + dfrac{3}{8} = -dfrac{3}{10};\y = -dfrac{3}{10} - dfrac{3}{8};\y = dfrac{-12 - 15}{40};\y = -dfrac{27}{40}.$

Ответ: $-dfrac{27}{40}$.

Answer 2

Спасибо