Question 375940
x^2-xy=10 (1)
x+y=8 (2)
x=8-y
plug value of x in (1)
(8-y)^2-(8-y)y-10=0
64-16y+y^2-8y+y^2-10=0
2y^2-24y+54=0
/2
y^2-12y+27=0
y^2-9y-3y+27=0
y(y-9)-3(y-9)=0
(y-3)(y-9)=0
y = 3 , y=9
y=3, x=5
y=9,x=-1
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