Question

Resolva o sistema:
X+4y=11
2x - 5y=1

Answer 1

metodo da adicao :

X+4y=11 .(-2)

2x -5y=1

_________

-2x-8y=-22

+2x-5y= 1

_________

-8y-5y=-22+1

-13y=-21

y=-21/-13

y=21/13

X+4y=11

x=11-4y

x=11-4.(21/13)

x=11-84/13

x=(143-84)/13

x= 59/13

Resposta :

S={ 59/13 ; 21/13}