Ответы и объяснения

Лучший Ответ!
2013-09-28T13:43:21+00:00
2 \frac{1}{7} : 2,5 = 8,4 : 7x

 \frac{15}{7} :  \frac{25}{10} = 8.4 : 7x

 \frac{6}{7} = 8.4 : 7x

7x =  \frac{84}{10} :  \frac{6}{7}

7x =  \frac{7}{5} * 7

7x =  \frac{49}{5}

x =  \frac{49}{5} : 7

x =  \frac{7}{5} = 1 \frac{2}{5} = 1.4
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4.5x : 2.7 = 9 : 1.8

 \frac{4.5x}{2.7} = \frac{9}{1.8}

4.5x * 1.8 = 2.7 * 9

4.5 * 1.8 = 24.3

4.5x = 24.3 : 1.8

4.5x = 13.5

x = 13.5 : 4.5

x=3
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