х(х+у)=15
у(х+у)=10
(х+у)=15/х
(х+у)=10/у
10х =15у
х=1,5у
1,5у(1,5у+у)=15
3,75у²=15
у²=4
у=2
х=1,5*2=3
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х(х+у)=15
у(х+у)=10
(х+у)=15/х
(х+у)=10/у
10х =15у
х=1,5у
1,5у(1,5у+у)=15
3,75у²=15
у²=4
у=2
х=1,5*2=3