Решите уравнение:
1) $7\frac{1}{2} : 4\frac{1}{2} = x : \frac{3}{25}$;
2) $\frac{24}{x + 2} = \frac{1}{5}$;
3) $\frac{y - 5}{6} = \frac{4}{3}$;
4) $\frac{2}{5} = \frac{6}{x + 3}$;
5) $\frac{5}{6} = \frac{15}{2x - 3}$;
6) $12 : \frac{4x}{5} = 20 : \frac{1}{4}$.
$7\frac{1}{2} : 4\frac{1}{2} = x : \frac{3}{25}$
$4\frac{1}{2}x = 7\frac{1}{2} * \frac{3}{25}$
$\frac{9}{2}x = \frac{15}{2} * \frac{3}{25}$
$\frac{9}{2}x = \frac{3}{2} * \frac{3}{5}$
$x = \frac{9}{10} : \frac{9}{2}$
$x = \frac{9}{10} * \frac{2}{9}$
$x = \frac{1}{5}$
$\frac{24}{x + 2} = \frac{1}{5}$
x + 2 = 24 * 5
x = 120 − 2
x = 118
$\frac{y - 5}{6} = \frac{4}{3}$
3 * (y − 5) = 4 * 6
y − 5 = 24 : 3
y = 8 + 5
y = 13
$\frac{2}{5} = \frac{6}{x + 3}$
2 * (x + 3) = 5 * 6
x + 3 = 30 : 2
x = 15 − 3
x = 12
$\frac{5}{6} = \frac{15}{2x - 3}$
5 * (2x − 3) = 6 * 15
2x − 3 = 90 : 5
2x = 18 + 3
x = 21 : 2
x = 10,5
$12 : \frac{4x}{5} = 20 : \frac{1}{4}$
$\frac{4x}{5} * 20 = 12 * \frac{1}{4}$
16x = 3
$x = \frac{3}{16}$
Пожауйста, оцените решение