zcmw125
zcmw125
22-08-2014
Mathematics
contestada
answer 1/5d + 1/8d=2
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luana
luana
22-08-2014
[tex]\frac{1}{5}d+\frac{1}{8}d=2\\\\ Make\ common\ denominator\ of\ \frac{1}{5}\ and\ \frac{1}{8}\ which\ is\ 40:\\\\ \frac{8}{40}d+\frac{5}{40}d=2\ \ \ |*40\\\\8d+5d=2*40\\\\ 13d=80\ \ |:13\\\\d=\frac{80}{13}=6\frac{2}{13}\\\\ Answer\ is\ d=6\frac{2}{13}.[/tex]
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AL2006
AL2006
22-08-2014
I thought you're saying that the
denominators
are 5d and 8d.
If so, then the common denominator is 40d, and 'd' turns out to be 13/80 .
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