Question

(у-2/15)÷1 5/6=2 1/5 ​

Answer 1

Ответ:

( у - 2/15 ) : 1 5/6 = 2 1/5

у - 2 /15 = 2 1/ 5 × 1 5 /6

у - 2 /15 = 121 / 30

у = 121/30 + 2/15

у = 4 1/6

Answer 2

Решение и ответ:

$\displaystyle \left({y-\frac{2}{{15}}}\right)\div1\frac{5}{6}=2\frac{1}{5}$

$\displaystyle y-\frac{2}{{15}}=2\frac{1}{5}\cdot1\frac{5}{6}$

$\displaystyle y-\frac{2}{{15}}=\frac{{11}}{5}\cdot\frac{{11}}{6}$

$\displaystyle y-\frac{2}{{15}}=\frac{{121}}{{30}}$

$\displaystyle y=\frac{{121}}{{30}}+\frac{2}{{15}}$

$\displaystyle y=\frac{{121}}{{30}}+\frac{4}{{30}}$

$\displaystyle y=\frac{{121+4}}{{30}}=\frac{{125}}{{30}}$

$\displaystyle y=\frac{{25}}{6}=\boxed{4\frac{1}{6}}$