Question

решите систему уравнений
2x+y=5
3x-5y=1

Answer 1

y=5-2x
3x-5(5-2x)=1,3x-25+10x=1
13x=26
x=2
y=5-2.2=5-4=1
y=1
/x,y/= /2,1/

Answer 2

$\left \{ {{2x+y=5} \atop {3x-5y=1}} \right. \\\\ \left \{ {{y=5-2x} \atop {3x-5(5-2x)=1}} \right. \\\\ \left \{ {{y=5-2x} \atop {13x=26}} \right.\\\\ \left \{ {{y=1} \atop {x=2}} \right.$