Question 185232
(12y +4x)+(15x+5)

This is not an equation.  If it is, where is the equal sign?  You cannot have an equation without the equal sign.

We have the addition of two binomials.

12y + 4x + 15x + 5

12y + 19x + 5

There is nothing more that can be done with this question.

Final answer: 12y + 19x + 5