dmdicarlo dmdicarlo

12-09-2016
Mathematics

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if 2s +10r = 2(2s-5r) = 42, then what is the value of r?

Respuesta :

12-09-2016

R=7/5
You can list two equations:
2s+10r=42 and 4s-10r=42.
Then try to delete S, you will get r

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