Question

Himp penyelesaian dr pers x+2y=4 dan 2x-y=3 adlah

Answer 1

X + 2y = 4 |x2|
2x - y  = 3 |x1|

2x + 4y = 8
2x - y    = 3
----------------  -
5y         = 5
y           = 1

2x + 4(1) = 8
2x + 4     = 8
2x           = 4
x             =2 

Hp . {(2,1)}

Answer 2

x+2y = 4
 2x-y = 3

eliminasi y:
 x+2y = 4
4x-2y = 6 (+)
     5x = 10
       x = 2...............y = (4-x)/2
                              y = (4-2)/2
                              y = 1

HP = (2,1)