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2014-09-06T20:57:46+03:00
2014-09-06T20:57:47+03:00
X·y=99=>y·y·99=99<=>y²=1<=>y=1 si x=99
x/y=99=>x=99·y
 
a+b=99
a-b=99
----------(+)
2a=198<=>a=99<=>b=0
1 5 1