Question

{ x = y - 5
y = 2x + 8

Answer 1

y = 2 ( y - 5 ) + 8

y = 2y - 10 + 8

y - 2y = -10 + 8

-y = -2
y = 2

x = 2 - 5

x = -3


Resp: x = -3 ;  y = 2

Answer 2

x=2x+8-5
x-2x=8-5
-x=3
x=-3