Question

Даю 10 баллов!

Решите уравнение:
(2 2/3х + 1 3/7х) * 21 = 58

Answer 1

Ответ:

Х = 58/86

Х = 29/43

Пошаговое объяснение:

( 2 2/3х + 1 3/7х ) • 21 = 58

2 2/3 + 1 3/7 = 2 14/21 + 1 9/21 = 3 23/21 = 4 2/21

( 4 2/21 )Х • 21 = 58

( 86/21 )Х = 58/21

86х = 58

Х = 58/86

Х = 29/43

Answer 2

Ответ:

$2\frac{3}{13}$

Пошаговое объяснение:

$(2\frac{2}{3}x + 1\frac{3}{7}x) * 21 = 58\n\\(2\frac{2*7}{3*7}x + 1\frac{3*3}{7*3}x) * 21 = 58\n\\(2\frac{14}{21}x + 1\frac{9}{21}x) * 21 = 58\n\\1\frac{5}{21}x * 21 = 58\n\\\frac{26}{21}x = \frac{58}{21}\n\\x = \frac{58}{21} / \frac{26}{21}x\n\\x = \frac{58}{21} * \frac{21}{26}x \n\\x = \frac{58}{26} = \frac{29}{13} = 2\frac{3}{13}\n$