what is the answer
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Step-by-step explanation:
x+y=9
y=9_x
1/x+1/y=1/2
1/x+1/9_x=1/2
(9_x+x)/9x_x²=2
9x_x²/9_2x=2
9x_x²=18_4x
x²_12x+18=0
solve this way
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