Revision as of 16:53, 5 March 2014 by Bobthesmartypants(talk | contribs)(Created page with "If <math>\dfrac{a+b}{b+c}=\dfrac{c+d}{d+a}</math>, then: <math>\textbf{(A) }a \text{ must equal }c\qquad\textbf{(B) }a+b+c+d\text{ must equal zero}\qquad</math> <math>\textbf{(...")