dayianalizardi
dayianalizardi dayianalizardi
  • 13-02-2014
  • Mathematics
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I really need help on geometry

I really need help on geometry class=

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crisforp
crisforp crisforp
  • 13-02-2014
For example, exc. 15.

x + y = 10 and 6/x = 9/y; You need y!

=> x = 10 -y and 9x = 6y => 9(10-y) = 6y => 90 - 9y = 6y => 15y = 90 => y = 6.
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