Matrix vextor addition or subtraction

I am trying to perform this simple operation on CVX toolbox.
[a b; c d]-[x;y] which should be equal [a-x b-x;c-y d-y].

CVX does not support implicit expansion, which was introduced into MATLAB in R2016b, but never incorporated into CVX.

You can use `repmat to accomplish what you want.

It worked perfectly. Thank you !