Question

1049. Решите уравнения: СРОЧНООО!!!​

Answer 1

Ответ:

1) x=7

2) x=3

Пошаговое объяснение:

1)$\frac{\frac{2}{15} }{\frac{1}{5}x-\frac{1}{3} } - \frac{1}{12} = \frac{1}{24}$

$\frac{\frac{2}{15} }{\frac{1}{5}x-\frac{1}{3} } = \frac{1}{12} + \frac{1}{24}$

$\frac{\frac{2}{15} }{\frac{1}{5}x-\frac{1}{3} } = \frac{3}{24}$

$\frac{2}{15} * 24 = 3(\frac{1}{5} x-\frac{1}{3} )$

$\frac{48}{15} = \frac{3x}{5} - 1$

$\frac{48}{15} + 1 = \frac{3x}{5}$

$\frac{63}{15} = \frac{3x}{5}$

$45x=315$

x = 7

2)$\frac{\frac{2}{9} }{\frac{5}{9}x-\frac{1}{2} } + \frac{1}{7} =\frac{1}{3}$

$\frac{\frac{2}{9} }{\frac{5}{9}x-\frac{1}{2} } = \frac{1}{3} - \frac{1}{7}$

$\frac{\frac{2}{9} }{\frac{5}{9}x-\frac{1}{2} } = \frac{7}{21} - \frac{3}{21}$

$\frac{\frac{2}{9} }{\frac{5}{9}x-\frac{1}{2} } = \frac{4}{21}$

$\frac{2}{9}*21= 4(\frac{5}{9}*x - \frac{1}{2} )$

$\frac{42}{9} = \frac{20x}{9} - 2$

$\frac{42}{9} = \frac{20x}{9} - 2\\\frac{60}{9} = \frac{20x}{9}\\60 = 20x\\x = 3$