Solve:
$x^{2} - 99 x + 810 = 0$ .

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Solution

Now,
$x^{2} - 99 x + 810 = 0$
or, $x^{2} - 90 x - 9 x + 810 = 0$
or, $(x - 9) (x - 90) = 0$
or, $x = 9, 90$ .

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Solve :

99x+101y=499

101x+99y= 501

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Solve for x and y

99x + 101y=499xy

101x +99y= 501xy

99 x + 101 y = 499

101 x + 99 y = 501

Solve the following systems of equations:
99x + 101y = 499
101x + 99y = 501

99 x + 101 y = 499

101 x + 99 y = 501

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