Mathematics: Apostal clerk sold 50 postage stamps for $16.05. some were 39-cent stamps and the rest were 24-cent stamps. how many 39-cent stamps were sold?

Apostal clerk sold 50 postage stamps for $16.05.

Ответ:

awdadaddda

15.01.2022

Mathematics

39x + 24(50 - x) = 1,605
13x + 8(50 - x) = 535
13x + 400 - 8x = 535
5x = 135
x = 27

27 of 39-cent stamps were sold

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Ответ:

esid906

22.05.2023

Mathematics

$\bf \begin{array}{ccll}
\stackrel{earned}{runs}&innings\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
72&162\\
x&9
\end{array}\implies \cfrac{72}{x}=\cfrac{162}{9}\implies \cfrac{72}{x}=\cfrac{18}{1}\implies \cfrac{72\cdot 1}{18}=x$

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Apostal clerk sold 50 postage stamps for $16.05. some were 39-cent stamps and the rest were 24-cent stamps. how many 39-cent stamps were sold?

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