Question

Ma puteti ajuta , va rog!!!

Answer 1

$\left \{ {{3x+y=-2} | *3\atop {-5x-3y=2}} \right.$ ⇔ $\left \{ {{9x+3y=-6} \atop {-5x-3y=2}} \right.$
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$4x / = -4$
$<strong> </strong>x = -1<strong> </strong>$  ⇔ $\left \{ {{x=-1} \atop {3x+y=-2}} \right.$ ⇔ $\left \{ {{x=-1} \atop {-3+y=-2}} \right.$ ⇔ $\left \{ {{x=-1} \atop {y=-2+3}} \right.$ ⇔ $\left \{ {{x=-1} \atop {y=1}} \right.$