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6x+4y=15
jawab:
4x-2y=4 mk 4x-4=2y shg 2x-2=y
substitusi ke persamaan kedua
menjadi
6x+4y=15
6x+4(2x-2)=15
6x+8x+8=15
14x=15-8
14x=7
x=1/2
substitusi ke persamaa
y=2x-2
y=2(1/2)-2
y=1-2
y=-1
maka x,y=(1/2,-1)
y + x = 2
substitusikan nilai x
y + (y + 2) = 2
y + y + 2 = 2
2y = 2 - 2
2y/2 = 0/2
y = 0
subtitusikan nilai y
x = 0 + 2
x = 2
Hp (2 , 0)