himpunan penyelesaian dari persamaan 5y + 2x =10 dam 4y- 4x =8 adalah

Eleminasi x
5y + 2x = 10 | ×2| 10y + 4x = 20
4y + 4x = 8 | ×1 | 4y + 4x = 8 -
--------------------------------------------------
6y = 12
y = 12/6
y = 2

Subtitusi y = 2 ke pers. 2
4y + 4x = 8
4(2) + 4x = 8
8 + 4x = 8
4x = 8 - 8
4x = 0
x = 0

Jadi HPnya adalah (0,2)

Jawab :

Eliminasi 

20y + 8x = 40
20y - 20x = 40
_____________ -
        28x = 0
            x = 0

substitusi ke 1

5y + 2x = 10
5y + 2(0) = 10
5y + 0 = 10
5y = 10 - 0
5y = 10
  y = 2

HP = {x, y} = {0, 2}