glendake
glendake glendake
  • 04-08-2019
  • Mathematics
contestada

find r

3(r - 7 ) = 4(2 - 2r) + 4

Respuesta :

jdoe0001 jdoe0001
  • 04-08-2019

[tex]\bf 3(r-7)=4(2-2r)+4\implies \stackrel{\textit{distributing}}{3r-21=8-8r+4}\implies 3r-21=12-8r \\\\\\ 11r-21=12\implies 11r=33\implies r=\cfrac{33}{11}\implies r=3[/tex]

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