Respuesta :

apologiabiology
factor out common thing

[tex] \frac{20r+10}{30r+15}= \frac{5(4r+2)}{5(6r+3)}= (\frac{5}{5} )( \frac{4r+2}{6r+3})= [/tex]
[tex](1)( \frac{4r+2}{6r+3})=\frac{4r+2}{6r+3}[/tex]

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