x2+xy+y2-5x=2
???????
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Step-by-step explanation:
x²+xy+y²-5x=2
x²-5x+xy+y²=2
x(x-5)+y(x+y)=2
(x+y)²(x-5)=2
(x+y)²=2(x-5)
(x+y)²=2x-10
(x+y)²=2x-10
2x=(x+y)²/10
x=(x+y)²/20
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