Question

4x+y=0
x+5y=-19
Quem souber Me ajude pf

Answer 1

4x + y=0 >> y=-4x
x + 5y = -19
---------
Substituindo :
x+5 (-4x)=-19
x+(-20x)=-19
-19x=-19
19x=19
x=1
LOGO:
4 (1)+y=0
y=-4

Answer 2

(I)
4x + y = 0
y = -4x

(II)
x + 5y = -19

Substituindo (I) em (II)

x + 5y = -19
x + 5(-4x) = -19
x - 20x = -19
-19x = -19
$x = \frac{-19}{-19}$
x = 1


y = -4x
y = -4.(1)
y = -4

Portanto:

x = 1
y = -4