Решите уравнение:
а) $\frac{3}{4}х = 1$;
б) $\frac{23}{20}у = 1$;
в) 0,8а = 1;
г) 0,7b = 1;
д) $\frac{8}{19}х = \frac{8}{19}$;
е) $\frac{12}{5}у = \frac{12}{5}$.
$\frac{3}{4}х = 1$
$х = 1 : \frac{3}{4} = 1 * \frac{4}{3} = 1\frac{1}{3}$
$\frac{23}{20}у = 1$
$\frac{23}{20}у = 1 : \frac{23}{20} = 1 * \frac{20}{23}$
0,8а = 1
$а = 1 : 0,8 = 1 : \frac{8}{10} = 1 * \frac{10}{8} = \frac{5}{4} = 1\frac{1}{4}$
0,7b = 1
$b = 1 : 0,7 = 1 : \frac{7}{10} = 1 * \frac{10}{7} = 1\frac{3}{7}$
$\frac{8}{19}х = \frac{8}{19}$
$х = \frac{8}{19} : \frac{8}{19} = \frac{8}{19} : \frac{19}{8} = 1$
$\frac{12}{5}у = \frac{12}{5}$
$у = \frac{12}{5} : \frac{12}{5} = \frac{12}{5} * \frac{5}{12} = 1$
Пожауйста, оцените решение
