Question

#75 (5,6)и #76 (5,6)​

Answer 1

Решение и ответ:

Задание 75

5) 5 ÷ 9 = 15 ÷ x

   x = 15 · 9 ÷ 5

   x = 27

6) 12 ÷ 7 = 60 ÷ x

   x = 7 · 60 ÷ 12

   x = 35

Задание 76

$\displaystyle \[5)\;\;\frac{x}{{10}}=\frac{{18}}{{60}}\]$

$\displaystyle \[\frac{x}{{10}}=\frac{3}{{10}}\]$

$\displaystyle x=\frac{{10\cdot 3}}{{10}}=\boxed {3}$

$\displaystyle \[6)\;\;\frac{{45}}{{25}}=\frac{{18}}{x}\]$

$\displaystyle \[\frac{9}{5}=\frac{{18}}{x}\]$

$\displaystyle x=\frac{{5\cdot 18}}{9}=\frac{{90}}{9}=\boxed{10}$