Question

Resolva o sistema 5x-10y=15 2x-4y=6

Answer 1

$\left \{ {{5x-10y=15} \atop {2x-4y=6}} \right.$
5x=15+10y
x=15/5+10y/5
x=3+2y

2(3+2y)-4y=6
6+4y-4y=6 
y=0
x=3+2.0
x=3

Answer 2

Sistemas lineares

2x-3y=11

6x-4y=3