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OpenStudy (anonymous):
The numerator of a certain fraction is 5 less than the denominator. If the fraction is equal to 3/4, what is the denominator of this fraction?
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OpenStudy (mertsj):
Let d = the denominator the numerator = d-5 So:\[\frac{d-5}{d}=\frac{3}{4}\]
OpenStudy (mertsj):
Cross multiply and solve. Can you do that?
Directrix (directrix):
4(d - 5) = 3d 4d - 20 = 3d d = 20
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