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OpenStudy (anonymous):
x+1 over x-1 = 14 over 20
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OpenStudy (anonymous):
\[(x + 1) \div (x - 1) = 14 \div 20\]
OpenStudy (anonymous):
set up as a proportion x + 1 = 14 ----- --- x - 1 20 cross multiply to get (x + 1)(20) = (x - 1)(14)
OpenStudy (anonymous):
then distribute: 20x + 20 = 14x - 14 solve for x
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