Question

Himpunan penyelesaian dr persamaan x+y=6 dan x-y=2 adlah

Answer 1

X + y = 6
x -  y = 2

----------------- -
2y     = 4
y       = 2

x  +2 = 6
x       = 4

Hp . {(4,2)}

Answer 2

x+y = 6
 x-y = 2 

eliminasi y:
x+y = 6
 x-y = 2  (+)
  2x = 8
    x = 4..........y = x-2
                      y = 4-2
                      y = 2

HP = (4,2)