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y=(2x-8)/5
Diperoleh gradien (m)=2/5
Karna garis yg melalui (7,2) sejajar dgn grs 2x-5y=8 maka gradiennya sma yaitu m=2/5
Pers.grs melalui (7,2) dgn m=2/5 :
(Y-Y1)=m(X-X1)
(y-2)=2/5(x-7)
y-2=2/5x-14/5
Y=2/5x-14/5+2
Y=2/5x-4/5
y-y1=m(x-x1)
y-2=2/5(x-7)
5y-10=2x-14
pg : 2x-5y-4