7x дробь 9 равна 5+x дробь 4. Created by tabulinska71. algebra-ru

7x дробь 9 равна 5+x дробь 4...

tabulinska71 @tabulinska71

July 2022 2 6 Report

7x дробь 9 равна 5+x дробь 4

eva12121290
$\frac{7x}{9} = \frac{5 + x}{4}$
28х=45+9х
19х=45
х=45/19

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Ответ:

$\frac{7x}{9} = \frac{5 + x}{4} \\ \\ 28x = 9 \times (5 + x) \\ \\ 28x = 45 + 9x \\ \\ 28x - 9x = 45 \\ \\ 19x = 45 \\ \\ x = \frac{45}{19} = 2 \frac{7}{19}$

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