Mathematics: Ihave 20 cookies requires 1/3 cup of butter to make how many cups of butter do i need to make 12 cookies

Ihave 20 cookies requires 1/3 cup of butter to make

Ответ:

raheeeq

06.01.2022

$\bf \begin{array}{ccll} cookies&\stackrel{butter}{cups}\\ \cline{1-2} 20&\frac{1}{3}\\\\ 12&x \end{array}\implies \cfrac{20}{12}=\cfrac{~~\frac{1}{3}~~}{x}\implies \cfrac{5}{3}=\cfrac{~~\frac{1}{3}~~}{\frac{x}{1}}\implies \cfrac{5}{3}=\cfrac{1}{3}\cdot \cfrac{1}{x} \\\\\\ \cfrac{5}{3}=\cfrac{1}{3x}\implies 15x=3\implies x = \cfrac{3}{15}\implies x = \cfrac{1}{5}$

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Ответ:

corcor19

09.06.2020

Mathematics

$4(x-3)-(2x+5)=-3x-27\\\\
4x-12-2x-5=-3x-27\\\\
4x-2x+3x=-27+12+5\\\\
5x=-10\\\\
x=-2$

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Ihave 20 cookies requires 1/3 cup of butter to make how many cups of butter do i need to make 12 cookies

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