Question

Himpunan penyelesaian 2x+y=5 dan x+y=3
tolong bantu jawablah penting

Answer 1

2x + y = 5
  x + y = 3 | x 2
---------------- 
2x + y = 5
2x + 2y = 6
-----------------  -
           y = -1

x-1 = 3
     x = 4

x = 4, y = -1

Answer 2

2x + y = 5
        y = 5 - 2x

      x + y = 3
x + 5 - 2x = 3
      x - 2x = 3 - 5
            -x = -2
             x = 2

x + y = 3
2 + y = 3
      y = 3 - 2
      y = 1

Himpunan Penyelesaian = {x, y} = {2, 1}