Question

реши уравнение (5/7y-1/4)*1/4=1/4
y=?

Answer 1

Ответ:

$( \frac{5}{7} y - \frac{1}{4} ) \times \frac{1}{4} = \frac{1}{4} \\ \frac{5}{7} y - \frac{1}{4} = \frac{1}{4} + \frac{1}{4} \\ \frac{5}{7} y - \frac{1}{4} = \frac{1}{2} \\ \frac{5}{7} y = \frac{1}{2} + \frac{1}{4} \\ \frac{5}{7} y = \frac{3}{4} \\ \\ y = 1 \frac{1}{20}$