Question 482901
(7-2n)/(7+2n) =1/18
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Cross-multiply to get:
18(7-2n) = 7+2n
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Distribute on the left side to get:
18*7 - 36n = 7+2n
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Get the variable terms on one side; the numbers on the other:
2n+36n = 18*7-7
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38n = 17*7
n = (119/38)
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Cheers,
Stan H.