Question

Rezolvati in multimea numerelor reale sistemal de ecuatii:
{x-y=0
{5x+y=1

Answer 1

$\left \{ {{x-y=2} \atop {5x+y=2}} \right.$
o sa folosesc metoda substitutiei si din prima raumra => x = y
5y +y = 1 <=> 6y = 1 => y = $\frac{1}{6}$ si cum x = y => x = $\frac{1}{6}$