SAT Question c602140f: Equivalent Expressions answer and explanation with Desmos solution

Choice A is incorrect and may be the result of using the sums of the coefficients of the existing $x$ and $y$ terms as the coefficients of the $x$ and $y$ terms in the new expressions.

Choice C is incorrect and may be the result of incorrectly combining like terms.

Choice D is incorrect and may be the result of using the incorrect sign in front of the $12y$ term.