Question

4x+2y=16
5x-3y=9 sistema linear

Answer 1

$\left \{ {4x+2y=16} \atop {5x-3y=9}} \right.$

Iremos usar a substituicao:

4x+2y=16
2x+y=8
2x=8-y
x=(8-y)/2

5((8-y)/2)-3y=9
(40-5y)/2-3y=9
40-5y-6y=18
40-11y=18
-11y=-22
y=2

x=(8-y)/2
x=(8-2)/2
x=6/2
x=3