Question

equacao linear de {x + 3y= 10 {2x+5y=17

Answer 1

$\left \{ {x + 3y= 10} \atop {2x+5y=17}} \right. \\ \left \{ {-2x-6y=-20} \atop {2x+5y=17}} \right. \\ -2x+2x-6y+5y=-20+17 \\ -y=-3 \\ y=3 \\ x+3y=10 \\ x+3*3=10 \\ x=10-9 \\ x=1$