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x-3=0
x=3
sisa 17
misak sisanya adalh ax+b
maka
f(3)= 3a+b
17=3a+b
dibagi 3x+4 sisa -9 maka
3x+4=0
3x=-4
x=-4/3
f(-4/3)=(-4/3)a+b
-9= (-4/3)a+b pers(2)
kedua pers di eliminasikan
3a+b=17
(-4/3)a+b=-9
kurangkan
(3+4/3)a =17-(-9)
(13/3)a = 17+9
a = 26 x 3/13
a = 2 x 3
a=6
3a+b=17
3(6)+b=17
b=17-18
b=-1
jadi sisanya 6x-1