If x=kc and y=kt,then y+x =?	Choose the correct choice from the following:
A) k(t+c)
B) k(c-t)
C) c(k-t)
D) t(k-c)
E) k(1-t)
Just put in the given values of y and x   y - x = kt - kc   Now take k common   y - x = k(t + c)   You get (k(t+c)) as your answer.
<result>A</result>
If x=kc and y=kt,then y+x =?