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Se rezolva in Z ecuația 2x+3y=1985-xy

Răspuns :

xy+2x+3y=1985
xy+2x+3y+6=1991
(x+3)(y+2)=1991
(x+3)(y+2)=11*181
x+3=11   y+2=181
x=8          y=179
Coronita ?