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Va rog frumos mai repede{2x+3y=5<=>
{X+y=15


Răspuns :

Avem asa,
[tex] \left \{ {{2x+3y=5} \atop {x+y=15|*(-2)}} \right. => \left \{ {{2x+3y=5} \atop {-2x-2y=-30 }} \right. => y=-25 => x=40.[/tex]