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if 1/xy (x+y)=3/4, and 1/y=1/2, what is the value of 1/x
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jamesjsilver2000
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Jim@StratusPrep
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The second statement says that y = 2....
So, 1/ 2x (x +2) = 3/4
or
x + 2 / 2x = 3/4
so 4x + 8 = 6x
8 = 2x or x = 4
Correct me if I got the translation of your question wrong...
So, 1/ 2x (x +2) = 3/4
or
x + 2 / 2x = 3/4
so 4x + 8 = 6x
8 = 2x or x = 4
Correct me if I got the translation of your question wrong...
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1/x + 1/y = (y+x)/xy.
Thus:
1/x = (x+y)/xy - 1/y = 3/4 - 1/2 = 1/4.
Thus:
1/x = (x+y)/xy - 1/y = 3/4 - 1/2 = 1/4.
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Followed here and elsewhere by over 1900 test-takers.
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As a tutor, I don't simply teach you how I would approach problems.
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prachisharma
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as per sceond equation, y=2
solve equation 1 using "y=2"
(x+y)/xy=3/4
4x+8=6x
x=4
1/x=1/4
solve equation 1 using "y=2"
(x+y)/xy=3/4
4x+8=6x
x=4
1/x=1/4
Prachi Sharma
