If x=kc and y=kt,then 2y+x =?  Choose the correct choice from the following choices
A) k(t-c)
B) k(c-t)
C) c(k-t)
D) k(2t+c)
E) k(1-t)
Just put in the given values of y and x   2y +x =2 kt +kc   Now take k common   2y + x = k(2t +c)   You get (k(2t+c)) as your answer.
<result>D</result>
If x=kc and y=kt,then 2y+x =?