Question

determine os valores de x e y:
x+y-25
2x+y=35

Answer 1

x+y=25 --> x= 25-y
2x+y=35

2(25-y) + y = 35
50-2y+y = 35
-1y= 35-50
-1y= -15 * (-1)
y= 15/1
y= 15

x+y=25
x+15= 25
x= 25 -  15
x= 10

s{ 10,15}

Answer 2

  x+y=25(-1)
2x+y=35

 -x -y= -25
 2x+y=35
  x = 10

y = 25 - x ==> y = 25 - 10 ==> y = 15