Question

trebuie sa rezolv acest sistem prin metoda reducerii.{2(x+1)-3(y-1)=-1
{5(x-2)-4(y-3)=1
va rog

Answer 1

$\left \{ {{2x+2-3y+3=-1} \atop {5x-10-4y+12=1}} \right.$
$\left \{ {{2x-3y+5=-1} \atop {5x-4y-2=1}} \right.$
$\left \{ {{2x-3y=-6 /*(-5)} \atop {5x-4y=3 /*(2)}} \right.$
$\left \{ {{-10x+15y=30} \atop {10x-8y=6}} \right.$
se aduna si =>7y=36=>y=36/7 si x=-7/3