Question

Rezolvati sistemul 2x+3y=13.
3x+2y=12

Answer 1

$\left \{ {{2x+3y=13 |*(-3)} \atop {3x+2y=12 |*2}} \right.$
$\left \{ {{-6x-9y=-39} \atop {6x+4y=24}} \right.$
-5y= -15 |:(-5)
y=3

$\left \{ {{2x+3y=13|*(-2)} \atop {3x+2y=12|*3}} \right.$$\left \{ {{-4x-6y=-26} \atop {9x+6y=36}} \right.$
5x=10 |:5
x=2
S={(2;3)}