Question

4x + y =0
6x - 3y =36

Answer 1

Resposta:

Metodo da substituiçao: 4x+y=0 ==> y= -4x

a)

6x-3y=36

6x-(3* -4x)=36

6x -(-12x)=36

6x+12x=36

18x=36

x=36/18

x=2

b)

achando o y => y= -4x

y= - 4*2

y= -8

==> 4x+y=0

4*(2)+(-8) = 0

8 - 8 = 0