Question

2x + y=5 /x+y=2(x-1) façam a conta pra mim pfv

Answer 1

2x + y = 5
x + y = 2x - 2                                 
x - 2x + y = -2
-x + y = -2
2x + y = 5
-x + y = -2
-x = -2 -y
2x + y = 5
2(-2-y) + y = 5
-4 -2y + y = 5
-2y + y = 5 +4
-y = 9 (-1)
y= 9

- x = -2 - y
- x = -2 - 9
- x = - 11 (-1)
x = 11
  S= ( 11, 9)