Question

S= (6, 5)
S= (- 4, 7)
S= (7, 8)
S= (9, - 5)
S= (7, - 5)

Answer 1

Resposta:

{x+y=2

{2x+3y=-1

-2{x+y=2

{2x+3y=-1

{-2x-2y=-4

{2x+3y=-1

0+y=-5

y=-5

{x-5=2

{2x+3.(-5)=-1

3x-20=1

3x=21

x=21/3

x=7

s=(7,-5)