Question

x - 8/15 = 4/5
12/23 + x = 24/25
​

Answer 1

Ответ:

Пошаговое объяснение:

х - 8/15 = 4/5

х = 4/5 + 8/15

х = 12/15 + 8/15

х = 20/15

х = 4/3

х = 1. 1/3

12/23 + х = 24/25

х = 24/25 - 12/23

х = 552/575 - 300/575

х = 252/575

Answer 2

Пошаговое объяснение:

$x - \frac{8}{15} = \frac{4}{5}$

$(\frac{15x}{15} - \frac{8}{15} ) = \frac{4}{5}$

$( \frac{1}{15} (15x - 8) = \frac{4}{5}$

$\frac{15(15x - 8)}{15} = 15 \times \frac{4}{5}$

$\frac{15(15x - 8)}{15} = \frac{15 \times 4}{5}$

$(15x - 8) = \frac{15 \times 4}{5}$

$15x - 8 = 3 \times 4$

$15x - 8 = 12$

$15x + (8 - 8) = 8 + 12$

$15x = 12 + 8$

$15x = 20$

$\frac{15x}{15} = \frac{20}{15}$

$x = \frac{20}{15}$

$x = \frac{4}{3}$

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$\frac{12}{23} + x = \frac{24}{25}$

$( \frac{23x}{23} + \frac{12}{23} ) = \frac{24}{25}$

$( \frac{1}{23} (23x + 12) = \frac{24}{25}$

$\frac{23(23x + 12)}{23} = 23 \times \frac{24}{25}$

$\frac{23(23x + 12)}{23} = \frac{23 \times 24}{25}$

$(23x + 12) = \frac{23 \times 24}{25}$

$(23x + 12) = \frac{552}{25}$

$23x + (12 - 12) = \frac{552}{25} - 12$

$23x = \frac{552}{25} - 12$

$23x = ( \frac{552}{25} - \frac{12 \times 25}{25} )$

$23x = \frac{552}{25} + \frac{ - 300}{25}$

$23x = ( \frac{552 - 300}{25} )$

$23x = \frac{252}{25}$

$x = \frac{ \frac{252}{23} }{25}$

$x = \frac{252}{575}$