Question

some one please answer.its very urgent

Answer 1

Hello
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x+ y = 16 _________(1)
x      =  16 - y ______(2) 
also , 1/x + 1/y = 1/3 ______(3) 
MBS by 3xy in 3 
we get 
3y + 3x = xy 
3(x+y)  = xy ______(4)
put x = 16-y in eq 4
3(16 - y + y ) = (16-y) y 
48                 = 16y - y²
y² - 16y + 48 = 0 
y² - 12y-4y + 48 = 0 
y(y -12) -4(y-12) = 0 
(y-12) (y-4)         = 0 
y = 12 or y = 4 
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x = 16 - y 
if y = 12 then x = 4 
if y = 4 then x = 12 
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