Question

resolva pelo metodo da substituiçao o sistema 8x+5y=11 4x+5y =3

Answer 1

{8x+5y=11
{4x+5y=3
5y=11-8x
4x+5(11-8x)=3
4x+55-40x=3
4x-40x=3-55
-36x=-52.(-1)
36x=52
x=52/36
x=1,44
8x+5y=11
8.(1,44)+5y=11
11,52+5y=11
5y=11-11,52
5y=-0,52
y=-0,52/5
y=-0,104
S={(1,44 -0,104)}