Question

suma y resta o reduccion -5x-5y=15 4x+y=-33

Answer 1

-5x-5y=15 (1)
4x+y=-33 (2)

Multiplicas la ecuación (2) por 5*

-5x - 5y = 15
20x + 5y = - 165
_____________
15x = -165

X = - 165/15

X = -11

Reemplazar x = -11 en (1)

-5x - 5y = 15
-5(-11) - 5y = 15
55 - 15 = 5y
40 = 5y
y = 40/5
y = 8