3х[tex] \frac{3x}{x+8} = \frac{5}{7} \frac{y-4}{2y} = \frac{3}{8}. Created by rubiroid1. matematika-ru

3х[tex] \frac{3x}{x+8} = \frac{5}{7} \frac{y-4}{2y} = \frac{3}{8}...

rubiroid1 @rubiroid1

July 2022 1 9 Report

3х[tex] \frac{3x}{x+8} = \frac{5}{7}

\frac{y-4}{2y} = \frac{3}{8}

Answers & Comments

paradiseva

Verified answer

$\frac{3x}{x+8} = \frac{5}{7} \\ 21x=5(x+8)\\ 21x=5x+40\\ 21x-5x=40\\ 16x=40\\ x=2,5
\\ ================\\ \frac{y-4}{2y} = \frac{3}{8}\\ 8(y-4)=6y\\ 8y-32=6y\\ 2y=32\\ y=16$

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rubiroid1 а как в первом примере 21х превратилось в 2х?

paradiseva была опечатка, я исправила, обновите страницу с решением

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Verified answer

iz dvuh splavov soderzhashih serebro poluchili tretij massa pervogo splava 50g

tex]...

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5...

dlina pryamougolnikav 3 raza bolshe shiriny dlinu umenshili na 20 a shirinu ume

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