Answer to Question #11887 in Algebra for Sadia

Question

if x=(p+q)/(p-q), then x-1=?

Answer 1

x-1=(p+q)/(p-q)-1=(p+q-(p-q))/(p-q)=(p+q-p+q)/(p-q)=(q+q)/(p-q)=2q/(p-q)