Question

x-y=-5 3x+3y=27 por favor me ajude

Answer 1

{x-y=-5
{3x+3y=27
x-y=-5.(-3)
{-3x+3y=15
{3x+3y=27
6y=42
y=42/6
y=7
3x+3y=27
3x+3.7=27
3x+21=27
3x=27-21
3x=6
x=6/3
x=2
S={(2, 7)}

Answer 2

x-y=-5  (3) 3x-3y=-15
3x+3y=27

6x=12
x=12/6
x=2

3x+3y=27
3.2+3y=27
6+3y=27
3y=27-6
3y=21
y=21/6
y=7

s=(2,7)