Question

Sistemas
2 x + y=10
4x-4y=x-y

Answer 1

$\left \{ {{2x+y=10} \atop {4x-4y=x-y}} \right. \\ \\ 4x=3y+x -> 3x=3y -> x=y \\ 2x+y=10 -> 2x+x=10 -> 3x=10 -> \\ x=10/3 \\ y =10/3$