Question

Rezolvati in multimea numerelor reale prin metoda reducerii sistemului de ecuatii
3x+2y=19
x+5y=15

Answer 1

$3x+2y=19|*5=\textgreater 15x+10y=95$

$x+5y=15|*2=\textgreater 2x+10y=30$

$13x=65$

$x=5$

$y=\frac{15-5}{5}=2$