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-5y=-2x+8
y=(-2x+8) per -5
y=2/5 x -8/5
m1=2/5
garis g2 //garis g1 maka m2=m1=2/5
dan melalui (7,2)
y-y1=m(x-x1)
(y-2=2/5(x-7)) dikali 5
5(y-2)=2(x-7)
5y-10=2x-14
5y=2x-14+10
5y=2x-4
y=(2x-4)per 5
y=2/5x-4/5