Chevere673
Chevere673
22-07-2014
Mathematics
Answered
x+y=10 , x+z=20 , y+z=24, x+y+z=???
and why??
Answer :
Аноним
Аноним
22-07-2014
[tex]+\left\{\begin{array}{ccc}x+y=10\\x+z=20\\y+z=24\end{array}\right\ \ \ \ \ add\ both\ sides\\----------\\2x+2y+2x=54\ \ \ \ |divide\ both\ sides\ by\ 2\\\\x+y+z=27[/tex]
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