Javier and Kumar shared some cards. Javier took 4/11 of the cards while Kumar took the rest. If Kumar took 9 more cards than Javier, how many cards were there at first ?

say x=the starting amount of cards. then 4/11*x+9=7/11*x moving things around makes 3/11*x=9 times 11 3x=99 divide 3 x=33