so the question is:

find the values of k and n if when you expand (1+x)^n, the coefficient of the (k+1) term is twice that of the kth term and the coefficient of the (k+10) term is twice that of the (k+11) term.

I tried to do this but to no prevail? Any help?

Am I supposed to have 2 equations? Cause i tried that, but I ended doing a whole page of work only to not get the answer.