Jika x pangkat 2+y pangkat 2=6xy,maka x kurang y per x+y adalah

x²+y²=6xy
(x+y)(x-y)=6xy
x+y = 6xy/(x-y)
x-y = 6xy/(x+y)

(x-y)/(x+y)
6xy/(x+y)÷6xy/(x-y)
x-y÷x+y = 1/6xy